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s
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m
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3
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Sep
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b
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20
2
6
:
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3
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3
-
1
3
2
1
1314
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in
al
s
o
u
r
c
e
b
y
em
b
ed
d
in
g
v
is
ib
le
o
r
in
v
i
s
ib
le
tag
s
in
it.
-
R
ev
er
s
e
i
m
ag
e
an
d
v
i
d
eo
s
e
ar
ch
:
T
in
E
y
e
an
d
Go
o
g
le
r
ev
er
s
e
im
ag
e
s
ea
r
c
h
ar
e
two
to
o
ls
th
at
ca
n
d
eter
m
in
e
wh
en
v
is
u
al
co
n
te
n
t f
ir
s
t a
p
p
ea
r
ed
o
n
lin
e.
-
B
lo
ck
ch
ain
t
ec
h
n
o
lo
g
y
:
b
lo
c
k
ch
ain
en
s
u
r
es
u
n
am
b
ig
u
o
u
s
tr
ac
ea
b
ilit
y
an
d
au
th
en
ticity
b
y
p
r
o
v
id
i
n
g
a
tam
p
er
-
p
r
o
o
f
led
g
er
t
h
at
r
ec
o
r
d
s
th
e
g
en
er
atio
n
o
f
m
ater
ial.
-
Netwo
r
k
a
n
aly
s
is
:
r
esear
ch
er
s
ca
n
d
eter
m
in
e
th
e
o
r
ig
in
al
s
o
u
r
ce
an
d
im
p
o
r
tan
t
in
f
lu
en
ce
r
s
b
y
ex
am
i
n
in
g
th
e
way
s
th
at
co
n
ten
t sp
r
ea
d
s
th
r
o
u
g
h
o
u
t so
cial
m
ed
ia
s
ites
.
-
UR
L
t
r
ac
k
in
g
: U
T
Ms,
o
r
u
n
iq
u
e
UR
L
p
ar
am
eter
s
,
aid
in
t
r
a
ck
in
g
th
e
o
r
ig
in
o
f
s
h
ar
e
d
m
at
er
ial.
-
Ma
ch
in
e
l
ea
r
n
in
g
a
n
d
AI
t
o
o
ls
:
Vir
al
m
ater
ial
ca
n
b
e
ef
f
icien
tly
tr
ac
ed
b
y
AI
alg
o
r
ith
m
s
tau
g
h
t
to
r
ec
o
g
n
ize
s
en
tim
en
t a
n
aly
s
is
,
co
n
tex
tu
al
cu
es,
a
n
d
co
n
ten
t d
is
s
em
in
atio
n
p
atter
n
s
.
T
h
e
p
r
o
p
o
s
ed
B
C
T
VC
O
s
y
s
t
em
o
f
f
er
s
k
ey
ad
v
an
tag
es
f
o
r
s
ec
u
r
e
an
d
r
eliab
le
co
n
te
n
t
tr
ac
k
in
g
.
T
h
e
s
y
s
tem
en
h
an
ce
s
ac
co
u
n
t
ab
ilit
y
b
y
lin
k
in
g
c
o
n
ten
t
to
i
ts
cr
ea
to
r
s
an
d
d
is
tr
ib
u
to
r
s
,
a
n
d
d
ec
en
tr
aliza
tio
n
elim
in
ates
r
elian
ce
o
n
a
s
in
g
le
au
th
o
r
ity
.
Ad
d
itio
n
ally
,
cr
o
s
s
-
p
latf
o
r
m
co
m
p
atib
ilit
y
s
u
p
p
o
r
ts
m
o
n
ito
r
in
g
ac
r
o
s
s
d
if
f
er
en
t
s
o
cial
m
e
d
ia
n
etwo
r
k
s
,
im
p
r
o
v
in
g
co
n
ten
t
m
o
d
er
atio
n
an
d
r
e
d
u
ci
n
g
th
e
s
p
r
ea
d
o
f
m
is
in
f
o
r
m
atio
n
.
2.
L
I
T
E
R
AT
U
RE
SU
RVE
Y
B
lo
ck
ch
ain
tech
n
o
lo
g
y
h
as
b
ec
o
m
e
a
p
o
te
n
t
in
s
tr
u
m
en
t
f
o
r
g
u
ar
an
teein
g
th
e
p
r
o
v
en
a
n
ce
,
au
th
en
ticatio
n
,
a
n
d
s
ec
u
r
ity
o
f
d
ig
ital
co
n
ten
t
in
a
v
ar
iety
o
f
f
ield
s
.
A
b
l
o
ck
ch
ain
-
b
ased
m
eth
o
d
f
o
r
tr
ac
k
in
g
d
ig
ital
co
n
te
n
t
u
s
in
g
cr
y
p
to
g
r
ap
h
ic
h
ash
es,
g
u
ar
a
n
teein
g
co
n
ten
t
in
te
g
r
ity
an
d
p
r
e
v
en
tin
g
tam
p
er
in
g
,
is
s
u
g
g
ested
[
1
]
.
Sh
u
et
a
l.
[
2
]
,
an
in
teg
r
ated
m
eth
o
d
in
f
ak
e
n
ews
d
etec
tio
n
is
p
r
o
p
o
s
ed
,
wh
er
e
AI
m
o
d
els
wer
e
p
air
ed
with
b
lo
ck
c
h
ain
to
co
n
f
ir
m
n
ews
au
th
en
ticity
.
T
h
is
in
cr
ea
s
ed
co
n
f
i
d
en
ce
b
u
t
n
ee
d
ed
b
r
o
a
d
ad
o
p
t
io
n
to
b
e
ef
f
ec
tiv
e.
Z
y
s
k
in
d
et
a
l.
[
3
]
p
r
esen
t
a
s
elf
-
s
o
v
er
eig
n
id
en
tity
(
SS
I
)
s
y
s
tem
th
at
u
s
es
b
lo
ck
ch
ain
to
au
th
e
n
ticate
u
s
er
s
,
im
p
r
o
v
in
g
s
ec
u
r
ity
an
d
p
r
iv
ac
y
b
u
t
r
e
q
u
ir
in
g
b
etter
u
s
ab
i
lity
f
o
r
wid
esp
r
ea
d
a
d
o
p
tio
n
.
A
b
lo
ck
ch
ain
-
b
ased
s
o
cial
m
ed
ia
p
latf
o
r
m
s
lik
e
Steem
it
ar
e
ex
am
in
ed
,
s
h
o
win
g
th
at
d
ec
en
tr
alize
d
m
ed
ia
is
f
ea
s
ib
le
b
u
t a
ls
o
p
o
in
tin
g
o
u
t th
e
d
an
g
er
s
o
f
to
k
en
v
alu
e
v
o
latilit
y
[
4
]
.
Ver
if
icatio
n
o
f
d
ig
ital
co
n
t
en
t
is
an
o
th
er
im
p
o
r
ta
n
t
u
s
e
ca
s
e
f
o
r
b
lo
ck
ch
ai
n
tech
n
o
lo
g
y
.
C
r
y
p
to
g
r
ap
h
ic
s
ig
n
atu
r
es
we
r
e
in
tr
o
d
u
ce
d
b
y
t
h
e
Ad
o
b
e
C
o
n
ten
t
Au
th
en
ticity
I
n
itiativ
e
to
co
n
f
ir
m
m
ed
ia
au
th
o
r
s
h
ip
;
t
h
eir
ef
f
icac
y
d
e
p
en
d
s
o
n
co
n
ten
t
p
r
o
v
id
er
s
’
c
o
llab
o
r
atio
n
[
5
]
.
B
lo
ck
ch
ain
te
ch
n
o
lo
g
y
was
u
s
ed
f
o
r
p
ictu
r
e
v
er
if
icatio
n
[
6
]
,
wh
ich
in
cr
ea
s
ed
d
ig
ital
im
a
g
e
tr
u
s
t
b
u
t
r
eq
u
ir
ed
in
ter
ac
ti
o
n
with
well
-
k
n
o
wn
s
y
s
tem
s
.
A
b
lo
ck
ch
ain
-
b
ased
au
th
en
ticatio
n
s
y
s
tem
f
o
r
jo
u
r
n
alis
m
is
p
r
o
p
o
s
ed
th
at
im
p
r
o
v
ed
p
u
b
lic
tr
u
s
t
in
th
e
f
ield
b
u
t
h
a
d
laten
cy
p
r
o
b
lem
s
wh
en
d
is
s
em
in
atin
g
n
ews
in
r
ea
l
tim
e
[
7
]
,
[
8
]
.
R
ed
d
y
et
a
l.
[
9
]
a
n
en
ter
p
r
is
e
-
lev
el
h
ier
ar
ch
ical
m
o
d
el
with
a
s
ec
u
r
e
d
ata
p
r
o
to
co
l
was
in
tr
o
d
u
ce
d
,
em
p
h
asizin
g
s
ec
u
r
e
d
ata
tr
an
s
m
is
s
io
n
an
d
in
teg
r
ity
ac
r
o
s
s
d
is
tr
ib
u
ted
ap
p
licatio
n
s
.
T
h
e
d
if
f
icu
lties
an
d
p
o
ten
tial
p
ath
s
o
f
AI
-
p
o
we
r
ed
f
alse
co
n
ten
t
id
en
tific
atio
n
wer
e
em
p
h
asized
[
1
0
]
-
[
1
2
]
,
an
d
th
e
n
ec
ess
ity
o
f
b
ig
d
atasets
to
in
cr
ea
s
e
ac
cu
r
ac
y
.
F
o
r
d
ec
en
t
r
alize
d
co
n
ten
t
a
u
th
en
ticatio
n
,
I
PF
S
is
co
m
b
in
e
d
with
m
ac
h
in
e
lea
r
n
in
g
to
im
p
r
o
v
e
s
ec
u
r
ity
b
u
t
n
ec
ess
itates
o
p
tim
izatio
n
f
o
r
p
r
ac
tical
u
s
e
[
1
3
]
,
[
1
4
]
.
Ad
d
itio
n
al
ly
,
an
AI
-
e
n
ab
led
b
lo
c
k
ch
ain
s
y
s
tem
f
o
r
co
n
ten
t
o
wn
er
s
h
i
p
v
er
if
icatio
n
an
d
f
r
au
d
u
len
t
co
n
te
n
t
id
e
n
tific
atio
n
was
cr
ea
ted
in
[
15
]
,
wh
ich
g
r
ea
tly
in
cr
ea
s
ed
ac
cu
r
ac
y
b
u
t
r
eq
u
ir
e
d
s
ca
lab
ilit
y
im
p
r
o
v
e
m
en
ts
.
A
s
m
ar
t
co
n
tr
ac
t
-
b
ased
m
eth
o
d
f
o
r
d
ig
ital
m
ed
ia
co
p
y
r
i
g
h
t
en
f
o
r
ce
m
en
t
was
p
r
esen
te
d
in
[
1
6
]
;
it
o
f
f
er
s
au
t
o
m
ated
e
n
f
o
r
ce
m
en
t
b
u
t
h
as
tr
o
u
b
le
g
ettin
g
leg
al
ad
o
p
tio
n
.
A
b
lo
ck
ch
ain
-
b
ased
co
p
y
r
ig
h
t
p
r
o
tectio
n
s
tr
ateg
y
was
p
r
esen
ted
in
[
1
7
]
,
[
1
8
]
,
w
h
ich
im
p
r
o
v
ed
e
n
f
o
r
ce
m
en
t
ca
p
ab
ilit
ies
b
u
t
n
ec
ess
itated
wid
er
le
g
al
r
ec
o
g
n
itio
n
.
I
n
a
s
im
ilar
way
in
[
1
9
]
,
h
o
w
s
m
ar
t
co
n
tr
ac
ts
ca
n
s
af
eg
u
ar
d
d
ig
ital
ass
ets
is
in
v
esti
g
ated
,
en
h
an
cin
g
o
wn
e
r
s
h
ip
tr
an
s
p
ar
e
n
cy
b
u
t
r
e
q
u
ir
in
g
m
o
r
e
r
o
b
u
s
t
leg
al
s
u
p
p
o
r
t.
San
g
ee
ta
an
d
Nam
[
2
0
]
cr
ea
te
d
a
co
n
te
n
t
-
ad
d
r
ess
ed
,
p
ee
r
-
to
-
p
ee
r
s
to
r
ag
e
s
y
s
tem
to
im
p
r
o
v
e
d
ata
av
ailab
ilit
y
,
b
u
t
it
h
as
p
r
o
b
lem
s
with
n
et
wo
r
k
c
o
n
g
esti
o
n
.
B
lo
ck
ch
ain
was
u
s
ed
t
o
h
an
d
le
d
ata
in
a
way
t
h
at
p
r
o
tects
p
r
iv
ac
y
,
im
p
r
o
v
in
g
u
s
er
co
n
tr
o
l
wh
ile
p
o
s
in
g
s
ec
u
r
it
y
is
s
u
es
d
u
r
i
n
g
d
ep
lo
y
m
e
n
t
in
[
2
1
]
.
E
th
er
e
u
m
’
s
d
ec
en
tr
alize
d
f
r
am
ewo
r
k
is
p
r
o
p
o
s
ed
,
wh
ich
o
f
f
e
r
s
s
elf
-
ex
ec
u
tin
g
s
m
ar
t
co
n
tr
ac
ts
b
u
t
h
as
p
r
o
b
lem
s
with
ex
ce
s
s
iv
e
en
er
g
y
c
o
n
s
u
m
p
tio
n
[
2
2
]
,
[
2
3
]
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
t J I
n
f
&
C
o
m
m
u
n
T
ec
h
n
o
l
I
SS
N:
2252
-
8
7
7
6
A
n
effec
tive
b
lo
ck
ch
a
i
n
-
b
a
s
ed
s
ystem
fo
r
t
r
a
ck
in
g
vira
l c
o
n
te
n
t o
r
ig
in
s
in
…
(
N
a
g
esw
a
r
a
r
a
o
S
ir
is
a
la
)
1315
3.
P
RO
P
O
SE
D
M
E
T
H
O
D
(
B
C
T
VCO
)
B
y
u
tili
zin
g
b
l
o
ck
ch
ain
te
ch
n
o
lo
g
y
,
B
C
T
VC
O
im
p
r
o
v
es
ac
co
u
n
ta
b
ilit
y
an
d
tr
a
n
s
p
ar
en
cy
.
T
h
e
b
lo
ck
ch
ai
n
s
to
r
es
a
cr
y
p
to
g
r
ap
h
ic
h
ash
,
wh
ich
ac
ts
as
a
u
n
iq
u
e
id
en
tific
atio
n
.
T
h
e
co
n
ten
t
h
ash
,
in
f
o
r
m
atio
n
,
an
d
in
ter
ac
tio
n
s
lik
e
s
h
ar
in
g
a
n
d
e
d
itin
g
a
r
e
a
ll
r
ec
o
r
d
e
d
b
y
s
m
ar
t
co
n
tr
ac
t
s
.
T
h
ese
co
n
tr
ac
ts
,
wh
ich
ar
e
wr
itten
in
So
lid
ity
an
d
d
ep
lo
y
ed
th
r
o
u
g
h
th
e
R
em
ix
I
DE
,
au
to
m
ate
tr
an
s
ac
tio
n
lo
g
g
in
g
an
d
v
er
if
icatio
n
.
A
p
r
o
o
f
o
f
s
tak
e
(
Po
S)
tech
n
iq
u
e
is
u
s
ed
b
y
th
e
s
y
s
tem
f
o
r
e
f
f
ec
tiv
e
an
d
d
ec
en
tr
alize
d
v
alid
atio
n
.
B
lo
ck
c
h
ain
tr
a
n
s
ac
tio
n
s
co
n
n
ec
te
d
to
th
e
o
r
ig
i
n
al
h
ash
a
r
e
u
s
ed
to
t
r
ac
k
th
e
s
p
r
ea
d
o
f
c
o
n
ten
t.
Ad
m
in
is
tr
ato
r
s
an
d
au
d
ito
r
s
ar
e
ab
le
to
i
d
en
tify
f
alse
in
f
o
r
m
atio
n
an
d
tr
ac
k
d
o
wn
t
h
e
s
o
u
r
ce
o
f
co
n
ten
t.
Sm
ar
t
co
n
tr
ac
ts
e
n
s
u
r
e
tam
p
e
r
-
p
r
o
o
f
ex
ec
u
tio
n
b
y
au
to
m
ati
ca
lly
r
ev
iewin
g
o
r
r
em
o
v
i
n
g
f
lag
g
ed
co
n
ten
t
if
it
ex
ce
ed
s
a
f
ak
e
-
c
o
u
n
t
th
r
esh
o
ld
.
W
h
ile
a
u
d
ito
r
s
tr
ac
k
t
h
e
im
p
ac
t
o
f
s
u
b
m
is
s
io
n
s
,
c
r
ea
to
r
s
k
ee
p
a
n
e
y
e
o
n
th
ei
r
s
tatu
s
.
B
y
r
estrict
in
g
ch
an
g
es
o
r
d
eletio
n
s
,
B
C
T
V
C
O
g
u
ar
an
tees
an
u
n
c
h
an
g
ea
b
le
co
n
ten
t
h
is
to
r
y
.
T
h
is
en
s
u
r
es
th
e
in
teg
r
ity
o
f
th
e
c
o
n
ten
t,
f
ig
h
ts
f
al
s
e
in
f
o
r
m
atio
n
,
an
d
e
n
co
u
r
a
g
es
r
e
s
p
o
n
s
ib
ilit
y
in
t
h
e
d
is
tr
ib
u
tio
n
o
f
d
ig
ital c
o
n
te
n
t.
T
h
e
m
eth
o
d
o
lo
g
y
in
v
o
lv
es th
r
ee
m
ajo
r
s
tep
s
:
-
C
o
n
ten
t
id
en
tific
atio
n
an
d
r
eg
is
tr
atio
n
:
u
s
in
g
cr
y
p
to
g
r
ap
h
ic
tech
n
iq
u
es,
co
n
ten
t
is
g
iv
en
a
u
n
iq
u
e
id
en
tific
atio
n
,
lik
e
a
co
n
te
n
t
h
ash
,
wh
en
it
is
p
r
o
d
u
ce
d
o
r
s
h
a
r
ed
o
n
a
s
o
cial
m
ed
ia
n
etwo
r
k
.
T
h
e
b
lo
ck
c
h
ain
th
e
n
r
ec
o
r
d
s
t
h
is
h
ash
.
-
Mo
n
ito
r
in
g
an
d
r
ec
o
r
d
in
g
tr
an
s
ac
tio
n
s
:
a
n
ew
tr
an
s
ac
tio
n
in
clu
d
in
g
t
h
e
s
p
ec
if
ics
o
f
t
h
e
ex
ch
an
g
e
(
s
u
ch
as
th
e
tim
estam
p
,
u
s
er
in
f
o
r
m
ati
o
n
,
a
n
d
p
latf
o
r
m
in
f
o
r
m
atio
n
)
is
g
en
e
r
ated
ea
ch
tim
e
th
e
item
is
s
h
ar
ed
,
r
ep
o
s
ted
,
o
r
alter
ed
.
-
Ver
if
icatio
n
an
d
u
d
itin
g
:
t
o
co
n
f
ir
m
th
e
co
n
ten
t
’
s
p
r
o
v
en
a
n
c
e
an
d
h
is
to
r
y
,
u
s
er
s
an
d
p
latf
o
r
m
m
o
d
er
ato
r
s
ca
n
s
en
d
q
u
e
r
ies
to
th
e
b
lo
ck
ch
ain
.
B
ec
au
s
e
th
e
b
lo
ck
ch
ai
n
is
d
ec
en
tr
alize
d
,
all
r
ec
o
r
d
s
ar
e
av
ailab
le
to
th
e
p
u
b
lic
a
n
d
th
e
d
ata
is
p
r
o
te
cted
ag
ain
s
t ta
m
p
er
in
g
f
o
r
au
d
it.
3
.
1
.
Arc
hite
ct
ure
o
f
B
CT
VC
O
s
y
s
t
em
F
i
g
u
r
e
1
il
l
u
s
t
r
a
t
es
t
h
e
a
r
c
h
it
e
ct
u
r
e
o
f
t
h
e
B
C
T
VC
O
s
y
s
t
e
m
,
w
h
e
r
e
u
s
e
r
s
i
n
t
e
r
a
c
t
t
h
r
o
u
g
h
s
o
c
i
a
l
m
e
d
ia
p
l
a
t
f
o
r
m
s
i
n
t
e
g
r
a
te
d
w
i
t
h
b
l
o
ck
c
h
a
i
n
l
a
y
e
r
s
.
T
h
e
b
l
o
c
k
c
h
a
i
n
i
n
f
r
a
s
t
r
u
c
t
u
r
e
s
u
p
p
o
r
t
s
s
e
v
e
r
al
c
o
r
e
c
o
m
p
o
n
e
n
t
s
,
i
n
c
l
u
d
i
n
g
n
o
d
e
s
/
v
a
l
i
d
at
o
r
s
,
t
h
e
c
o
n
t
e
n
t
t
r
a
c
k
i
n
g
s
y
s
t
e
m
,
a
n
d
s
m
a
r
t
c
o
n
t
r
a
c
ts
t
o
e
n
s
u
r
e
t
r
an
s
p
a
r
e
n
c
y
a
n
d
d
a
t
a
i
n
t
e
g
r
i
t
y
.
F
u
r
t
h
e
r
m
o
r
e
,
t
h
e
s
y
s
t
e
m
e
n
a
b
l
es
t
r
a
c
k
i
n
g
o
f
o
r
i
g
i
n
a
l
c
o
n
t
e
n
t
s
o
u
r
c
e
s
,
p
r
o
p
a
g
a
ti
o
n
h
i
s
t
o
r
y
,
a
n
d
v
i
r
al
c
o
n
t
e
n
t
d
i
s
s
e
m
i
n
at
i
o
n
,
w
h
i
le
p
r
o
v
i
d
i
n
g
a
n
a
l
y
t
i
c
a
l
i
n
s
i
g
h
ts
t
h
r
o
u
g
h
t
h
e
a
n
a
l
y
t
i
cs
d
a
s
h
b
o
a
r
d
.
Fig
u
r
e
1
.
Flo
w
o
f
co
n
te
n
t f
r
o
m
its
cr
ea
tio
n
to
its
tr
ac
k
in
g
v
i
a
th
e
b
lo
ck
c
h
ain
3
.2
.
T
ra
c
k
ing
o
ut
v
ir
a
l c
o
nt
ent
o
rig
in
-
C
o
n
ten
t
h
ash
in
g
:
e
ac
h
co
n
te
n
t
item
is
m
ain
tain
ed
with
a
u
n
iq
u
e
cr
y
p
to
g
r
a
p
h
ic
h
ash
(
d
ig
ital
f
in
g
er
p
r
in
t)
,
an
y
m
in
o
r
ch
a
n
g
es to
lead
s
to
p
r
o
d
u
ce
a
d
if
f
er
en
t
h
ash
,
th
u
s
en
s
u
r
in
g
r
eliab
le
c
o
n
ten
t i
d
en
t
if
icatio
n
.
-
B
lo
ck
ch
ain
r
ec
o
r
d
in
g
:
a
p
er
m
an
en
t
an
d
tam
p
er
-
p
r
o
o
f
r
e
co
r
d
will
b
e
c
r
ea
ted
th
r
o
u
g
h
a
b
lo
c
k
ch
ain
tr
an
s
a
ctio
n
th
at
en
co
m
p
ass
es
co
n
ten
t h
ash
,
p
latf
o
r
m
,
tim
estam
p
,
an
d
u
s
er
d
etails
.
-
Pro
p
ag
atio
n
t
r
ac
k
in
g
:
in
co
n
n
ec
tio
n
with
th
e
o
r
i
g
in
al
h
ash
,
ev
er
y
i
n
ter
ac
tio
n
(
s
h
ar
e/ed
it)
is
r
ec
o
r
d
e
d
as
a
n
ew
tr
an
s
ac
tio
n
,
s
o
th
at
it
f
o
r
m
s
a
tr
ac
ea
b
le
ch
ain
th
at
ca
p
tu
r
es
co
n
ten
t
s
p
r
ea
d
an
d
m
o
d
i
f
icatio
n
s
ac
r
o
s
s
p
latf
o
r
m
s
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
2
5
2
-
8
7
7
6
I
n
t J I
n
f
&
C
o
m
m
u
n
T
ec
h
n
o
l
,
Vo
l.
1
5
,
No
.
3
,
Sep
tem
b
er
20
2
6
:
1
3
1
3
-
1
3
2
1
1316
-
B
lo
ck
ch
ain
q
u
er
y
i
n
g
:
t
h
e
c
o
m
p
lete
h
is
to
r
y
o
f
a
co
n
te
n
t,
in
clu
d
in
g
o
r
ig
in
,
in
itial
u
p
lo
ad
,
an
d
all
s
u
b
s
eq
u
en
t in
ter
ac
tio
n
s
is
m
ai
n
tain
ed
.
T
h
is
allo
ws th
e
u
s
er
s
f
o
r
r
ea
l
-
tim
e
tr
a
ck
in
g
.
-
I
m
m
u
tab
le
tr
ac
ea
b
ilit
y
:
th
r
o
u
g
h
th
e
b
lo
ck
c
h
ain
tr
an
s
ac
tio
n
s
,
all
in
ter
ac
tio
n
s
ar
e
r
ec
o
r
d
e
d
as
r
esis
tan
t
t
o
m
an
ip
u
latio
n
.
3
.3
.
Securit
y
t
hrea
t
s
a
nd
m
i
t
ig
a
t
io
ns
Sy
b
il
attac
k
s
an
d
m
itig
atio
n
s
.
B
C
T
V
C
O
’
s
r
elian
ce
o
n
cr
o
wd
au
d
itin
g
an
d
Po
S
v
alid
ati
o
n
cr
ea
tes
p
o
ten
tial
f
o
r
Sy
b
il
attac
k
s
-
wh
er
e
an
ad
v
er
s
ar
y
g
en
er
ates
m
an
y
p
s
eu
d
o
-
id
en
titi
es
to
m
an
i
p
u
late
au
d
its
,
f
lag
s
,
o
r
v
alid
ato
r
elec
tio
n
s
[
2
4
]
,
[
2
5
]
.
T
o
m
itig
ate
th
is
r
is
k
,
a
lay
er
ed
s
ec
u
r
ity
ap
p
r
o
ac
h
is
r
ec
o
m
m
en
d
ed
:
o
p
er
atin
g
B
C
T
V
C
O
o
n
a
p
er
m
is
s
io
n
ed
Po
S
o
r
PB
FT
-
s
ty
le
co
n
s
o
r
tiu
m
w
ith
KYC
-
v
er
if
ied
v
a
lid
ato
r
s
;
r
eq
u
ir
in
g
v
er
if
iab
le
cr
e
d
en
tials
(
DI
D/SS
I
)
f
o
r
u
s
er
s
in
v
o
lv
ed
i
n
au
d
itin
g
;
ap
p
ly
i
n
g
s
tak
e
-
b
ac
k
ed
weig
h
ted
v
o
tin
g
wit
h
s
lash
in
g
p
en
alties f
o
r
m
alicio
u
s
b
eh
av
io
r
; a
n
d
en
a
b
lin
g
r
ate
-
l
im
itin
g
alo
n
g
s
id
e
o
f
f
-
ch
ai
n
an
o
m
aly
d
etec
tio
n
t
o
id
en
tify
f
r
au
d
u
len
t
ac
tiv
ity
.
C
r
itical
au
to
m
ated
ac
tio
n
s
s
u
ch
as
co
n
te
n
t
r
em
o
v
al
s
h
o
u
ld
b
e
p
r
o
tecte
d
u
s
in
g
q
u
o
r
u
m
o
r
m
u
lti
-
s
ig
n
atu
r
e
a
p
p
r
o
v
al,
alo
n
g
with
an
ap
p
ea
l
m
ec
h
an
is
m
to
av
o
i
d
ir
r
ev
er
s
ib
le
d
ec
is
io
n
s
tr
ig
g
er
ed
b
y
Sy
b
il
-
d
r
iv
e
n
m
a
n
ip
u
latio
n
.
Priv
a
cy
co
n
ce
r
n
s
r
elate
d
to
KYC
ca
n
b
e
a
d
d
r
e
s
s
ed
u
s
in
g
s
elec
tiv
e
d
is
clo
s
u
r
e
an
d
ze
r
o
-
k
n
o
wled
g
e
p
r
o
o
f
s
,
en
s
u
r
in
g
Sy
b
il
-
r
esis
tan
ce
wh
ile
p
r
eser
v
in
g
u
s
er
p
r
i
v
ac
y
[
2
6
]
.
4.
RE
SU
L
T
S AN
D
D
I
SCU
SS
I
O
N
I
n
th
is
s
ec
tio
n
,
we
o
u
tlin
e
t
h
e
to
o
ls
,
alg
o
r
ith
m
s
,
an
d
tech
n
o
lo
g
ies
u
s
ed
in
th
e
im
p
lem
en
tatio
n
o
f
B
C
T
V
C
O
.
E
x
p
er
im
en
tal
s
etu
p
:
f
o
r
ef
f
ec
t
iv
e
an
d
s
ec
u
r
e
tr
an
s
ac
tio
n
v
alid
atio
n
,
th
e
B
C
T
VC
O
s
y
s
tem
u
s
es
a
P
o
S
co
n
s
en
s
u
s
p
r
o
ce
s
s
.
B
ef
o
r
e
m
o
v
in
g
to
a
p
u
b
lic
n
etwo
r
k
,
th
e
b
lo
ck
c
h
ain
a
r
ch
itectu
r
e
is
d
ev
elo
p
ed
o
n
a
lo
ca
l
Har
d
h
at
n
o
d
e,
wh
ich
f
ac
ilit
ates
test
in
g
an
d
th
e
d
ep
l
o
y
m
en
t
o
f
s
m
ar
t
c
o
n
tr
ac
ts
.
C
o
n
ten
t
cr
ea
tio
n
,
s
h
ar
in
g
,
v
er
if
icatio
n
,
an
d
au
d
itin
g
ar
e
m
an
ag
ed
b
y
s
m
ar
t
co
n
tr
ac
ts
cr
ea
ted
with
So
lid
ity
in
th
e
R
e
m
ix
I
DE
.
R
ea
ct.
js
,
wh
ich
was
s
elec
ted
f
o
r
th
e
f
r
o
n
ten
d
d
u
e
to
its
m
o
d
u
lar
it
y
an
d
ef
f
ec
tiv
e
s
tate
m
an
ag
e
m
en
t,
allo
ws
f
o
r
a
r
esp
o
n
s
iv
e
u
s
er
in
ter
f
ac
e
f
o
r
co
n
ten
t
au
d
its
.
Me
taM
ask
is
u
s
ed
to
ac
h
iev
e
W
eb
3
in
teg
r
a
tio
n
.
I
n
T
a
b
le
1
,
all
th
e
co
m
p
o
n
en
ts
an
d
tec
h
n
o
lo
g
ies o
f
B
C
T
VC
O
ar
e
lis
ted
o
u
t.
T
ab
le
1
.
Su
m
m
a
r
y
o
f
to
o
ls
an
d
tech
n
o
l
o
g
ies
C
o
m
p
o
n
e
n
t
Te
c
h
n
o
l
o
g
y
u
se
d
C
o
n
se
n
s
u
s
a
l
g
o
r
i
t
h
m
P
o
S
B
l
o
c
k
c
h
a
i
n
d
e
v
e
l
o
p
m
e
n
t
e
n
v
i
r
o
n
m
e
n
t
Lo
c
a
l
H
a
r
d
h
a
t
N
o
d
e
S
mart
c
o
n
t
r
a
c
t
c
o
m
p
i
l
a
t
i
o
n
a
n
d
d
e
p
l
o
y
me
n
t
R
e
m
i
x
I
D
E
F
r
o
n
t
e
n
d
f
r
a
mew
o
r
k
R
e
a
c
t
.
j
s
B
l
o
c
k
c
h
a
i
n
w
a
l
l
e
t
M
e
t
a
M
a
s
k
Data
Set
:
t
h
e
ev
alu
atio
n
in
th
is
wo
r
k
u
s
es
a
s
y
n
th
etic
d
ataset
g
en
er
ated
th
r
o
u
g
h
s
im
u
la
ted
s
o
cial
m
ed
ia
in
ter
ac
tio
n
s
.
A
g
r
o
u
p
o
f
v
i
r
tu
al
u
s
er
s
is
c
r
ea
ted
to
ac
t
as
co
n
ten
t
cr
ea
to
r
s
,
r
e
-
s
h
ar
er
s
,
an
d
au
d
ito
r
s
.
E
ac
h
s
im
u
lated
ac
tio
n
in
th
e
s
y
s
tem
au
to
m
atica
lly
g
e
n
er
at
es
a
b
lo
ck
c
h
ain
tr
an
s
ac
tio
n
,
e
n
ab
lin
g
ev
alu
atio
n
with
o
u
t th
e
n
ee
d
f
o
r
an
e
x
ter
n
al
d
ataset.
E
ac
h
tr
an
s
ac
tio
n
r
e
co
r
d
co
n
s
is
ts
o
f
th
e
f
o
llo
win
g
f
ield
s
:
-
C
o
n
ten
t H
ash
-
u
n
iq
u
e
SHA
-
2
5
6
f
in
g
e
r
p
r
in
t
o
f
u
p
lo
ad
e
d
co
n
t
en
t
.
-
User
I
D
-
p
s
eu
d
o
n
y
m
o
u
s
id
en
tity
o
f
th
e
p
ar
ticip
atin
g
u
s
er
.
-
T
im
estam
p
-
tim
e
o
f
u
p
lo
ad
,
s
h
ar
in
g
,
o
r
au
d
i
t
.
-
I
n
ter
ac
tio
n
T
y
p
e
-
cr
e
ate,
s
h
ar
e,
ed
it,
v
er
if
y
,
o
r
au
d
it
.
-
Platfo
r
m
T
ag
-
s
im
u
lated
p
latf
o
r
m
u
s
ed
f
o
r
d
is
s
em
in
atio
n
.
T
h
is
co
n
tr
o
lled
d
ataset
allo
ws
u
s
to
an
aly
ze
tr
ac
k
in
g
d
elay
,
s
to
r
ag
e
g
r
o
wth
,
an
d
u
s
er
p
ar
t
icip
atio
n
tr
en
d
s
as
th
e
n
u
m
b
er
o
f
tr
an
s
ac
tio
n
s
in
cr
ea
s
es.
I
n
f
u
tu
r
e
wo
r
k
,
we
p
lan
to
v
alid
ate
B
C
T
VC
O
u
s
in
g
r
ea
l
s
o
cial
m
ed
ia
d
atasets
an
d
lar
g
e
-
s
ca
le
u
s
er
i
n
ter
ac
tio
n
s
to
test
th
e
p
r
ac
tical
d
ep
lo
y
m
en
t o
f
th
e
s
y
s
tem
.
S
ca
la
b
ilit
y
a
n
d
C
o
s
t
C
o
n
s
id
era
tio
n
s
:
Un
lik
e
p
u
b
lic
E
th
e
r
eu
m
m
ain
n
et
d
ep
lo
y
m
en
ts
,
B
C
T
V
C
O
u
tili
ze
s
a
p
r
iv
ate
Po
S
b
l
o
ck
c
h
ain
,
elim
in
atin
g
h
ig
h
g
as
f
e
es.
On
ly
h
ash
-
le
v
el
m
etad
ata
is
s
to
r
ed
o
n
-
ch
ain
,
wh
ile
b
u
lk
co
n
ten
t
r
esid
es
o
n
I
PF
S,
wh
ich
s
ig
n
if
ican
tly
r
ed
u
ce
s
b
lo
ck
ch
ai
n
s
to
r
ag
e
co
s
ts
.
Fu
tu
r
e
wo
r
k
in
clu
d
es
d
ep
lo
y
in
g
B
C
T
VC
O
o
v
er
l
o
w
-
co
s
t
lay
er
-
2
n
etwo
r
k
s
s
u
ch
as
Po
ly
g
o
n
a
n
d
B
SC
to
en
s
u
r
e
co
s
t
-
ef
f
icien
t a
n
d
s
ca
lab
le
o
p
er
atio
n
d
u
r
i
n
g
m
ass
ad
o
p
tio
n
.
I
n
Fig
u
r
e
2
,
th
e
g
r
a
p
h
in
d
icate
s
a
lin
ea
r
r
is
e
in
tr
ac
k
in
g
tim
e,
in
d
icatin
g
th
at
th
e
s
y
s
tem
ta
k
es
l
o
n
g
er
to
tr
ac
k
th
e
o
r
i
g
in
o
f
co
n
ten
t
as
m
o
r
e
tr
an
s
ac
tio
n
s
tak
e
p
lac
e.
I
n
Fig
u
r
e
3
,
tr
an
s
ac
tio
n
v
alid
atio
n
is
ev
alu
ated
.
T
h
e
tim
e
a
cr
o
s
s
n
o
d
es
b
o
x
p
l
o
t
illu
s
tr
ates
th
e
v
ar
iatio
n
in
v
alid
atio
n
tim
e
am
o
n
g
th
r
ee
d
is
tin
ct
n
o
d
es
in
a
b
lo
ck
ch
ain
n
etwo
r
k
.
T
h
r
ee
d
i
s
tin
ct
n
o
d
es
(
n
o
d
es
1
,
2
,
an
d
3
)
ar
e
r
e
p
r
esen
ted
b
y
th
e
X
-
a
x
is
(
n
o
d
es)
in
th
is
.
T
h
e
tim
e
r
eq
u
ir
e
d
f
o
r
tr
an
s
ac
tio
n
v
alid
atio
n
at
ea
c
h
n
o
d
e
i
s
s
h
o
wn
o
n
th
e
Y
-
ax
is
(
v
alid
atio
n
tim
e
in
m
s
)
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
t J I
n
f
&
C
o
m
m
u
n
T
ec
h
n
o
l
I
SS
N:
2252
-
8
7
7
6
A
n
effec
tive
b
lo
ck
ch
a
i
n
-
b
a
s
ed
s
ystem
fo
r
t
r
a
ck
in
g
vira
l c
o
n
te
n
t o
r
ig
in
s
in
…
(
N
a
g
esw
a
r
a
r
a
o
S
ir
is
a
la
)
1317
T
h
e
in
ter
q
u
ar
tile
r
a
n
g
e
(
I
QR
)
,
wh
ich
is
r
e
p
r
esen
ted
b
y
t
h
e
b
o
x
es,
i
n
d
i
ca
tes
th
e
r
a
n
g
e
o
f
v
alid
atio
n
tim
es.
T
h
e
m
e
d
ian
v
alid
atio
n
tim
e
is
s
h
o
wn
b
y
th
e
h
o
r
izo
n
tal
lin
e
in
s
id
e
th
e
b
o
x
.
T
h
e
v
alid
atio
n
tim
es
f
o
r
ea
c
h
o
f
th
e
th
r
ee
n
o
d
es
ar
e
q
u
ite
co
m
p
ar
ab
le.
No
d
e
3
h
as
a
s
lig
h
tly
lo
wer
m
ax
im
u
m
v
alid
ati
o
n
tim
e
(
~3
0
m
s
)
,
wh
ile
No
d
e
2
h
as
th
e
g
r
ea
test
(
~3
5
m
s
)
.
T
h
e
m
ed
ian
v
alid
a
tio
n
tim
es
ar
e
clo
s
e
to
2
0
m
m
s
ac
r
o
s
s
all
n
o
d
es,
s
h
o
win
g
a
r
elativ
ely
s
tab
le
tr
a
n
s
ac
tio
n
p
r
o
ce
s
s
in
g
tim
e.
I
n
Fig
u
r
e
4
,
th
e
ac
cu
r
ac
y
o
f
co
n
ten
t
o
r
ig
in
is
ev
alu
ated
f
o
r
tr
ac
in
g
as
a
f
u
n
ctio
n
o
f
tr
a
cin
g
tim
e
d
el
ay
,
is
s
ee
n
in
th
is
s
ca
tter
p
lo
t.
T
h
e
tim
e
r
e
q
u
ir
ed
t
o
tr
ac
k
d
o
wn
t
h
e
co
n
te
n
t
’
s
o
r
ig
in
al
s
o
u
r
ce
is
s
h
o
wn
o
n
th
e
X
-
ax
is
(
tim
e
d
elay
in
s
ec
o
n
d
s
)
.
T
h
e
ac
cu
r
ac
y
o
f
i
d
en
tify
in
g
th
e
co
n
ten
t
’
s
o
r
ig
in
al
s
o
u
r
ce
is
r
ep
r
esen
ted
b
y
th
e
Y
-
ax
is
(
ac
cu
r
ac
y
in
p
er
c
en
tag
e)
.
T
h
e
ac
cu
r
ac
y
o
f
c
o
n
ten
t
o
r
ig
in
tr
ac
in
g
d
ec
lin
es
w
ith
in
cr
ea
s
in
g
tim
e
d
elay
.
Acc
u
r
ac
y
is
9
9
%
at
1
s
ec
o
n
d
d
elay
,
s
u
g
g
esti
n
g
alm
o
s
t
f
lawless
tr
ac
k
in
g
.
Acc
u
r
ac
y
d
ec
r
ea
s
es
to
8
9
%
af
ter
5
s
ec
o
n
d
s
o
f
d
elay
,
d
em
o
n
s
tr
atin
g
h
o
w
d
elay
s
im
p
air
tr
ac
k
in
g
p
r
ec
is
io
n
.
T
h
i
s
d
ec
lin
in
g
tr
en
d
im
p
lies
th
at
m
o
r
e
ac
cu
r
ate
f
in
d
in
g
s
co
m
e
f
r
o
m
f
aster
co
n
ten
t t
r
ac
k
in
g
.
Fig
u
r
e
2
.
C
o
n
ten
t
o
r
ig
in
tr
ac
k
i
n
g
tim
e
g
r
o
wth
Fig
u
r
e
3
.
T
r
an
s
ac
tio
n
v
alid
ati
o
n
Fig
u
r
e
4
.
Acc
u
r
ac
y
o
f
co
n
ten
t
o
r
ig
in
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
2
5
2
-
8
7
7
6
I
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t J I
n
f
&
C
o
m
m
u
n
T
ec
h
n
o
l
,
Vo
l.
1
5
,
No
.
3
,
Sep
tem
b
er
20
2
6
:
1
3
1
3
-
1
3
2
1
1318
I
n
F
ig
u
r
e
5
,
th
e
C
o
n
s
en
s
u
s
alg
o
r
ith
m
ev
alu
ates
th
e
ef
f
icac
y
o
f
s
ev
er
al
b
lo
ck
c
h
ain
co
n
s
en
s
u
s
alg
o
r
ith
m
s
f
o
r
l
o
ca
tin
g
th
e
s
o
u
r
ce
s
o
f
v
ir
al
m
ater
ial
o
n
s
o
ci
al
m
ed
ia.
W
h
ile
Po
S
(
~9
0
%)
an
d
DPo
S
(
~8
5
%)
p
er
f
o
r
m
b
etter
with
i
n
cr
ea
s
ed
ef
f
icien
cy
,
Po
W
h
as
th
e
lo
w
est
ef
f
icac
y
(
~6
5
%)
due
t
o
its
s
lo
wer
tr
an
s
ac
tio
n
s
p
ee
d
an
d
g
r
ea
ter
c
o
m
p
u
tin
g
ex
p
en
s
es.
PB
FT
(
~8
0
%)
p
r
o
v
id
es
s
p
ee
d
ier
co
n
s
en
s
u
s
an
d
is
f
r
eq
u
en
tly
u
s
ed
in
p
er
m
is
s
io
n
ed
n
etwo
r
k
s
.
Du
e
t
o
its
p
ar
tic
u
lar
a
r
ch
itectu
r
e
f
o
r
tr
ac
k
i
n
g
v
ir
al
c
o
n
ten
t,
wh
ic
h
p
r
o
b
a
b
ly
i
n
clu
d
es
ef
f
icien
t
d
ata
v
er
if
icatio
n
,
s
tr
ea
m
lin
ed
co
n
s
en
s
u
s
p
r
o
ce
s
s
es,
an
d
in
ter
ac
tio
n
with
I
PF
S
f
o
r
d
ec
en
tr
alize
d
s
to
r
ag
e,
B
C
T
VC
O
ac
h
iev
es th
e
m
ax
im
u
m
e
f
f
ec
tiv
en
ess
(
~9
5
%).
I
n
Fig
u
r
e
6
,
t
h
e
s
ca
lab
ilit
y
o
f
s
ev
er
al
b
lo
ck
ch
ain
c
o
n
s
en
s
u
s
m
eth
o
d
s
:
p
r
o
o
f
o
f
wo
r
k
(
P
o
W
)
,
Po
S,
d
eleg
a
ted
p
r
o
o
f
o
f
s
tak
e
(
DPo
S),
p
r
a
ctica
l
b
y
za
n
tin
e
f
a
u
lt
to
ler
an
ce
(
PB
FT)
,
an
d
B
C
T
VC
O
is
ex
p
r
ess
ed
in
tr
an
s
ac
tio
n
s
p
er
s
ec
o
n
d
(
T
PS
)
.
Po
S
(
~5
0
T
PS
)
an
d
DPo
S
(
~1
0
0
T
PS
)
d
em
o
n
s
tr
ate
b
e
n
ef
its
b
y
lo
wer
in
g
en
er
g
y
co
n
s
u
m
p
tio
n
an
d
b
o
o
s
tin
g
ef
f
icien
c
y
,
wh
e
r
ea
s
Po
W
h
as
th
e
lo
west
s
ca
lab
ilit
y
b
ec
au
s
e
o
f
its
co
m
p
u
tatio
n
ally
d
em
a
n
d
in
g
m
in
in
g
p
r
o
ce
s
s
.
B
ec
au
s
e
it
r
e
q
u
ir
es
co
n
s
en
s
u
s
am
o
n
g
a
p
r
e
d
eter
m
i
n
ed
s
elec
tio
n
o
f
n
o
d
es
r
ath
er
th
a
n
m
in
in
g
,
PB
FT
(
~2
0
0
T
PS
)
p
er
f
o
r
m
s
b
etter
.
W
ith
th
e
g
r
ea
test
T
PS
(
~3
0
0
)
,
B
C
T
VC
O
p
er
f
o
r
m
s
b
etter
t
h
an
th
e
o
th
er
s
,
m
o
s
t
lik
ely
as
a
r
esu
lt
o
f
its
s
tr
ea
m
lin
ed
c
o
n
s
en
s
u
s
p
r
o
ce
s
s
cr
ea
ted
esp
ec
ially
f
o
r
tr
ac
k
i
n
g
v
i
r
al
m
ater
ial.
I
n
Fig
u
r
e
7
u
s
er
p
a
r
ticip
atio
n
in
au
d
itin
g
co
m
p
ar
is
o
n
e
v
alu
a
tes
an
d
co
n
tr
asts
th
e
p
er
ce
n
tag
e
o
f
u
s
er
s
wh
o
p
a
r
ticip
ated
in
au
d
its
ac
r
o
s
s
v
ar
io
u
s
b
l
o
ck
ch
ai
n
co
n
s
en
s
u
s
alg
o
r
ith
m
s
.
T
h
e
y
-
ax
is
s
h
o
ws
th
e
p
r
o
p
o
r
tio
n
o
f
p
eo
p
le
ac
tiv
ely
p
ar
ticip
ati
n
g
in
a
u
d
its
,
wh
il
e
th
e
x
-
ax
i
s
d
ep
icts
s
ev
er
al
co
n
s
en
s
u
s
m
ec
h
an
is
m
s
—
Po
W
,
DPo
S,
PB
FT,
an
d
B
C
T
V
C
O.
B
ec
au
s
e
Po
W
r
elies
m
o
r
e
o
n
m
in
in
g
th
an
o
n
d
ir
ec
t
au
d
itin
g
,
it
h
as
th
e
lo
west
u
s
er
en
g
a
g
em
en
t
r
ate
(
~3
0
%).
W
h
ile
PB
FT
(
~7
8
%)
g
en
er
at
es
ev
en
h
ig
h
er
i
n
v
o
lv
e
m
en
t
b
y
n
ee
d
i
n
g
v
alid
ato
r
ag
r
ee
m
en
t,
DPo
S
(
~6
0
%)
in
c
r
ea
s
es
p
ar
ticip
atio
n
b
y
lettin
g
u
s
er
s
v
o
te
f
o
r
d
eleg
ates.
T
h
e
r
ea
s
o
n
B
C
T
VC
O
h
as
th
e
h
ig
h
est
p
ar
ticip
atio
n
r
ate
(
ar
o
u
n
d
8
0
%)
is
p
r
o
b
a
b
ly
b
ec
au
s
e
it
was
cr
ea
te
d
s
p
ec
if
i
ca
lly
to
t
r
ac
k
v
ir
al
m
ater
ial,
an
d
au
d
itin
g
is
an
ess
en
tial c
o
m
p
o
n
en
t o
f
its
v
er
if
icatio
n
p
r
o
ce
d
u
r
e.
T
h
e
ev
alu
ati
o
n
p
r
esen
ted
in
t
h
is
wo
r
k
u
s
es
a
co
n
t
r
o
lled
e
x
p
e
r
im
en
tal
s
etu
p
with
s
y
n
th
eti
c
in
ter
ac
tio
n
lo
g
s
g
en
er
ated
th
r
o
u
g
h
s
im
u
lated
co
n
ten
t
s
h
ar
in
g
an
d
au
d
itin
g
b
eh
av
io
r
.
T
h
is
d
ataset
allo
ws
u
s
to
em
p
ir
ically
an
aly
ze
s
ca
lab
ilit
y
,
s
to
r
ag
e
g
r
o
wth
,
an
d
tr
ac
k
in
g
d
elay
u
n
d
er
in
cr
ea
s
in
g
lo
ad
.
Alth
o
u
g
h
th
e
r
esu
lts
d
em
o
n
s
tr
ate
f
ea
s
ib
ilit
y
an
d
o
p
er
atio
n
al
ef
f
icie
n
cy
,
in
teg
r
a
tio
n
with
m
ajo
r
s
o
cial
m
ed
ia
p
latf
o
r
m
s
an
d
r
ea
l
-
wo
r
ld
d
ata
s
ets
i
s
p
lan
n
ed
as
p
ar
t
o
f
f
u
tu
r
e
d
e
v
elo
p
m
e
n
t.
Su
ch
d
ep
l
o
y
m
en
t
will
en
ab
le
v
alid
atio
n
i
n
p
r
ac
tical
en
v
ir
o
n
m
en
ts
with
lar
g
e
-
s
ca
le
u
s
er
in
ter
ac
tio
n
s
,
d
iv
er
s
e
co
n
ten
t ty
p
es,
an
d
r
ea
l p
r
o
p
ag
atio
n
p
atter
n
s
.
Fig
u
r
e
5
.
E
f
f
ec
tiv
en
ess
s
co
r
e
co
n
s
en
s
u
s
alg
o
r
ith
m
Fig
u
r
e
6
.
Scalab
ilit
y
o
f
a
b
lo
c
k
ch
ain
-
b
ased
s
y
s
tem
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
t J I
n
f
&
C
o
m
m
u
n
T
ec
h
n
o
l
I
SS
N:
2252
-
8
7
7
6
A
n
effec
tive
b
lo
ck
ch
a
i
n
-
b
a
s
ed
s
ystem
fo
r
t
r
a
ck
in
g
vira
l c
o
n
te
n
t o
r
ig
in
s
in
…
(
N
a
g
esw
a
r
a
r
a
o
S
ir
is
a
la
)
1319
Fig
u
r
e
7
.
User
p
a
r
ticip
atio
n
in
au
d
itin
g
c
o
m
p
ar
is
o
n
4.
CO
NCLU
SI
O
N
I
n
co
n
tr
ast
to
co
n
v
en
tio
n
al
v
er
if
icatio
n
tech
n
i
q
u
es
th
at
d
ep
en
d
o
n
ex
te
r
n
al
en
f
o
r
c
em
en
t
an
d
ce
n
tr
al
ized
r
ep
o
s
ito
r
ies.
Her
e
,
th
e
p
r
o
p
o
s
ed
s
y
s
tem
B
C
T
VC
O
u
s
es
I
PF
S
f
o
r
d
ec
en
tr
alize
d
s
to
r
ag
e,
E
th
er
eu
m
s
m
ar
t
co
n
tr
ac
ts
f
o
r
o
wn
er
s
h
ip
tr
ac
k
in
g
,
a
n
d
SHA
-
2
5
6
h
ash
i
n
g
f
o
r
co
n
te
n
t
f
in
g
er
p
r
in
tin
g
.
T
h
is
g
iv
es
co
n
ten
t
p
r
o
v
id
e
r
s
a
s
af
e
an
d
s
ca
lab
le
s
o
lu
tio
n
b
y
r
em
o
v
in
g
th
e
r
is
k
s
r
elate
d
to
ce
n
s
o
r
s
h
ip
,
m
an
ip
u
latio
n
,
an
d
s
in
g
le
p
o
in
ts
o
f
f
ailu
r
e
.
T
h
e
b
en
ef
its
o
f
b
lo
c
k
ch
ain
-
b
ased
o
wn
er
s
h
ip
tr
ac
k
in
g
a
r
e
h
ig
h
lig
h
ted
b
y
co
m
p
ar
is
o
n
s
with
tr
ad
itio
n
al
d
ig
ital
r
ig
h
ts
m
an
a
g
em
en
t
(
DR
M)
.
AI
-
p
o
wer
ed
v
er
if
icatio
n
an
d
d
ec
e
n
tr
alize
d
s
to
r
ag
e,
esp
ec
ially
in
ter
m
s
o
f
au
to
m
ated
d
etec
t
io
n
,
ta
m
p
er
-
p
r
o
o
f
v
e
r
if
icatio
n
,
an
d
f
ast
n
o
tific
atio
n
s
.
Ou
r
ap
p
r
o
ac
h
o
f
f
er
s
a
cr
y
p
to
g
r
ap
h
ically
s
ec
u
r
e
an
d
d
eter
m
in
is
tic
s
u
b
s
titu
te
f
o
r
co
n
v
e
n
tio
n
al
au
th
en
ticati
o
n
m
eth
o
d
s
,
wh
ich
f
r
eq
u
e
n
tly
h
av
e
s
ig
n
if
ican
t f
al
s
e
-
p
o
s
itiv
e
r
ates a
n
d
m
an
u
al
o
v
er
s
ig
h
t.
T
h
e
n
e
x
t
-
g
en
e
r
atio
n
W
eb
3
ec
o
s
y
s
tem
is
m
ad
e
p
o
s
s
ib
le
b
y
th
is
s
y
s
tem
,
wh
ich
s
tr
en
g
th
en
s
d
ig
ital
co
n
ten
t
s
ec
u
r
ity
an
d
c
o
p
y
r
ig
h
t
p
r
o
tectio
n
b
y
co
m
b
in
in
g
b
lo
c
k
ch
ain
tech
n
o
lo
g
y
,
d
ec
en
tr
alize
d
s
to
r
ag
e,
an
d
s
o
p
h
is
ticated
f
r
au
d
d
e
tectio
n
tech
n
iq
u
es.
I
n
f
u
tu
r
e
w
o
r
k
,
we
p
lan
to
ev
alu
ate
th
e
s
y
s
tem
u
s
in
g
r
ea
l
s
o
cial
m
ed
ia
d
atasets
an
d
lar
g
e
-
s
ca
le
u
s
er
in
ter
ac
tio
n
s
to
v
alid
ate
its
p
r
ac
tical
d
ep
lo
y
m
en
t.
F
UNDING
I
NF
O
R
M
A
T
I
O
N
No
f
u
n
d
in
g
in
v
o
lv
e
d
.
AUTHO
R
CO
NT
RI
B
UT
I
O
NS ST
A
T
E
M
E
N
T
T
h
is
jo
u
r
n
al
u
s
es
th
e
C
o
n
tr
ib
u
to
r
R
o
les
T
ax
o
n
o
m
y
(
C
R
ed
iT)
to
r
ec
o
g
n
ize
in
d
iv
id
u
al
au
th
o
r
co
n
tr
ib
u
tio
n
s
,
r
ed
u
ce
au
th
o
r
s
h
ip
d
is
p
u
tes,
an
d
f
ac
ilit
ate
co
llab
o
r
atio
n
.
Na
m
e
o
f
Aut
ho
r
C
M
So
Va
Fo
I
R
D
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Vi
Su
P
Fu
Nag
eswar
a
r
ao
Sirisala
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
Srin
iv
asu
lu
Sirisala
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
Nala
v
ala
R
am
an
jan
ey
a
R
ed
d
y
✓
✓
✓
✓
✓
✓
Sy
ed
An
is
h
a
✓
✓
✓
✓
✓
✓
C
:
C
o
n
c
e
p
t
u
a
l
i
z
a
t
i
o
n
M
:
M
e
t
h
o
d
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l
o
g
y
So
:
So
f
t
w
a
r
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Va
:
Va
l
i
d
a
t
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Fo
:
Fo
r
mal
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n
a
l
y
s
i
s
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:
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n
v
e
s
t
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g
a
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R
:
R
e
so
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r
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D
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r
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t
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r
i
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r
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&
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d
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e
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f
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ter
est.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
2
5
2
-
8
7
7
6
I
n
t J I
n
f
&
C
o
m
m
u
n
T
ec
h
n
o
l
,
Vo
l.
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.
3
,
Sep
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b
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20
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:
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1320
DATA AV
AI
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[
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[
2
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.
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[
3
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.
Zy
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d
v
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d
b
l
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c
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e
s
,
”
I
EEE
T
ra
n
s
a
c
t
i
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n
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e
u
ra
l
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t
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/
TN
N
LS.
2
0
2
1
.
3
0
5
2
0
4
4
.
[
1
4
]
A
.
S
h
a
h
z
a
d
,
W
.
C
h
e
n
,
Y
.
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h
a
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g
,
a
n
d
R
.
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u
m
a
r
,
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Ze
r
o
-
t
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st
me
d
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c
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l
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ma
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a
r
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s
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y
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m
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v
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0
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3
3
9
0
/
s
y
m1
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0
4
0
5
5
1
.
[
1
5
]
S
.
D
h
a
l
l
,
A
.
D
.
D
w
i
v
e
d
i
,
S
.
K
.
P
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l
,
a
n
d
G
.
S
r
i
v
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st
a
v
a
,
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l
o
c
k
c
h
a
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n
-
b
a
se
d
f
r
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mew
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k
f
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d
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g
f
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k
e
o
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v
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c
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s
n
e
w
s
sp
r
e
a
d
o
n
so
c
i
a
l
m
e
d
i
a
/
mes
sa
g
i
n
g
p
l
a
t
f
o
r
ms,”
AC
M
T
r
a
n
s
a
c
t
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o
n
s
o
n
As
i
a
n
a
n
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Re
s
o
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e
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u
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g
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1
0
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1
1
4
5
/
3
4
6
7
0
1
9
.
[
1
6
]
F
.
F
r
a
t
t
o
l
i
l
l
o
,
“
B
l
o
c
k
c
h
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n
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f
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h
t
p
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e
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t
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o
n
,
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Fu
t
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re
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t
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l
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3
3
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i
1
6
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5
0
1
6
9
.
[
1
7
]
N
.
S
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r
i
sal
a
a
n
d
C
.
B
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n
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u
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A
N
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l
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o
S
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st
C
o
m
p
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t
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t
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o
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n
M
A
N
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Ts
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g
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N
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s,
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n
t
e
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1
3
.
[
1
8
]
Q
.
C
h
e
n
,
Y
.
K
o
n
g
,
a
n
d
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h
e
n
g
,
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d
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t
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t
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n
Pr
o
c
.
I
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1
0
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h
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f
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d
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p
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g
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C
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d
)
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I
EEE
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t
h
I
n
t
.
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f
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d
g
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d
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)
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i
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3
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0
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3
.
[
1
9
]
F
.
B
a
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n
a
n
d
M
.
R
a
b
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t
t
i
,
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r
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l
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k
c
h
a
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:
a
n
e
m
p
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c
a
l
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n
v
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st
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g
a
t
i
o
n
,
”
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o
m
p
u
t
e
r
L
a
w
&
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u
r
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t
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R
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e
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5
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p
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.
c
l
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.
2
0
2
4
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1
0
6
0
3
5
.
[
2
0
]
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.
S
a
n
g
e
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t
a
a
n
d
S
.
Y
.
N
a
m,
“
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l
o
c
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n
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n
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l
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(
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P
F
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)
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d
d
a
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a
r
c
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c
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b
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l
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y
,
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l
e
c
t
ro
n
i
c
s,
v
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l
.
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2
,
p
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1
5
4
5
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0
2
3
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1
0
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3
3
9
0
/
e
l
e
c
t
r
o
n
i
c
s
1
2
0
7
1
5
4
5
.
[
2
1
]
G
.
Zy
s
k
i
n
d
,
O
.
N
a
t
h
a
n
,
a
n
d
A
.
S
.
P
e
n
t
l
a
n
d
,
“
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e
c
e
n
t
r
a
l
i
z
i
n
g
p
r
i
v
a
c
y
:
U
s
i
n
g
b
l
o
c
k
c
h
a
i
n
t
o
p
r
o
t
e
c
t
p
e
r
s
o
n
a
l
d
a
t
a
,
”
i
n
Pro
c
.
I
EEE
S
e
c
u
r
i
t
y
a
n
d
P
ri
v
a
c
y
Wo
r
k
s
h
o
p
s,
S
a
n
Jo
se
,
C
A
,
U
S
A
,
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0
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5
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p
p
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8
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8
4
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1
0
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1
1
0
9
/
S
P
W
.
2
0
1
5
.
2
7
.
[
2
2
]
N
.
N
i
z
a
mu
d
d
i
n
,
K
.
S
a
l
a
h
,
M
.
A
.
A
z
a
d
,
J.
A
r
s
h
a
d
,
a
n
d
M
.
H
.
R
e
h
man
,
“
D
e
c
e
n
t
r
a
l
i
z
e
d
d
o
c
u
me
n
t
v
e
r
si
o
n
c
o
n
t
r
o
l
u
s
i
n
g
e
t
h
e
r
e
u
m
b
l
o
c
k
c
h
a
i
n
a
n
d
I
P
F
S
,
”
C
o
m
p
u
t
e
rs
&
El
e
c
t
ri
c
a
l
En
g
i
n
e
e
r
i
n
g
,
v
o
l
.
7
6
,
p
p
.
1
8
3
–
1
9
7
,
2
0
1
9
,
d
o
i
:
1
0
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1
0
1
6
/
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.
c
o
m
p
e
l
e
c
e
n
g
.
2
0
1
9
.
0
3
.
0
1
4
.
[
2
3
]
N
.
S
i
r
i
s
a
l
a
,
A
.
Y
a
r
a
v
a
,
Y
.
C
.
A
.
P
.
R
e
d
d
y
,
a
n
d
P
.
V
e
e
r
e
s
h
,
“
A
n
o
v
e
l
t
r
u
st
r
e
c
o
mm
e
n
d
a
t
i
o
n
m
o
d
e
l
i
n
o
n
l
i
n
e
s
o
c
i
a
l
n
e
t
w
o
r
k
s
u
si
n
g
so
f
t
c
o
m
p
u
t
i
n
g
m
e
t
h
o
d
s,
”
C
o
n
c
u
r
ren
c
y
a
n
d
C
o
m
p
u
t
a
t
i
o
n
:
Pr
a
c
t
i
c
e
a
n
d
E
x
p
e
ri
e
n
c
e
,
v
o
l
.
3
4
,
n
o
.
2
2
,
e
7
2
8
1
,
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0
2
2
,
d
o
i
:
1
0
.
1
0
0
2
/
c
p
e
.
7
2
8
1
.
[
2
4
]
M
.
Jo
h
n
,
V
.
B
.
A
m
b
h
o
r
e
,
C
.
K
a
r
t
h
i
k
e
y
a
n
,
M
.
G
u
p
t
a
,
P
.
C
h
a
n
d
r
a
k
a
l
a
,
a
n
d
A
.
G
a
r
g
,
“
I
mp
r
o
v
i
n
g
t
r
u
st
ma
n
a
g
e
m
e
n
t
i
n
I
o
T
-
e
d
g
e
n
e
t
w
o
r
k
s
w
i
t
h
b
l
o
c
k
c
h
a
i
n
a
n
d
e
n
h
a
n
c
e
d
ET
EE
a
p
p
r
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a
c
h
f
o
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S
y
b
i
l
a
t
t
a
c
k
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d
u
c
t
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o
n
,
”
i
n
Pr
o
c
.
I
E
EE
4
t
h
I
n
t
.
C
o
n
f
.
I
C
T
i
n
B
u
si
n
e
ss
I
n
d
u
st
r
y
&
G
o
v
e
r
n
m
e
n
t
(
I
C
T
BI
G
)
,
I
n
d
o
r
e
,
I
n
d
i
a
,
2
0
2
4
,
p
p
.
1
–
6
,
d
o
i
:
1
0
.
1
1
0
9
/
I
C
TB
I
G
6
4
9
2
2
.
2
0
2
4
.
1
0
9
1
1
5
1
3
.
[
2
5
]
A
.
El
g
a
l
a
l
y
,
A
.
F
a
h
m
y
,
A
.
A
h
me
d
,
M
.
Y
o
u
s
si
f
,
M
.
Ess
a
m,
a
n
d
S
.
A
.
E
.
M
o
h
a
m
e
d
,
“
B
l
o
c
k
c
h
a
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n
-
d
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v
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d
e
f
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n
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f
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n
s
o
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a
l
me
d
i
a
p
l
a
t
f
o
r
ms,
”
i
n
Pr
o
c
.
1
2
t
h
I
n
t
.
J
a
p
a
n
-
Af
r
i
c
a
C
o
n
f
.
El
e
c
t
ro
n
i
c
s,
C
o
m
m
u
n
i
c
a
t
i
o
n
s,
a
n
d
C
o
m
p
u
t
a
t
i
o
n
s
(
J
A
C
-
EC
C
)
,
A
l
e
x
a
n
d
r
i
a
,
Eg
y
p
t
,
2
0
2
4
,
p
p
.
1
7
0
–
1
7
5
,
d
o
i
:
1
0
.
1
1
0
9
/
JA
C
-
EC
C
6
4
4
1
9
.
2
0
2
4
.
1
1
0
6
1
2
3
5
.
[
2
6
]
R
.
L
i
,
Y
.
S
u
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I
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f
&
C
o
m
m
u
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n
o
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SS
N:
2252
-
8
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A
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effec
tive
b
lo
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ch
a
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b
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in
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(
N
a
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a
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S
ir
is
a
la
)
1321
B
I
O
G
RAP
H
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S O
F
AUTH
O
RS
Dr
.
Na
g
e
sw
a
r
a
r
a
o
S
irisa
la
h
a
s
re
c
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iv
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d
P
h
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in
th
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De
p
t
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(CS
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fro
m
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Un
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rsit
y
An
a
n
tap
u
ra
m
u
,
AP,
In
d
ia.
He
h
a
s
p
u
b
li
sh
e
d
m
o
re
th
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n
2
0
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se
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h
p
a
p
e
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tern
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a
l
c
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re
n
c
e
s
a
n
d
j
o
u
rn
a
ls.
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a
re
a
o
f
in
tere
st
is
m
o
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il
e
a
d
-
h
o
c
n
e
tw
o
rk
s,
a
lg
o
rit
h
m
s,
a
n
d
s
o
ft
c
o
m
p
u
t
in
g
m
e
th
o
d
s.
He
c
a
n
b
e
c
o
n
tac
ted
a
t
e
m
a
il
:
n
a
g
sirisa
la@
g
m
a
il
.
c
o
m
.
Dr
.
S
r
in
iv
a
sul
u
S
iris
a
la
h
a
s
c
o
m
p
lete
d
h
is
P
h
.
D
.
in
Co
m
p
u
ter
S
c
ien
c
e
fro
m
S
ri
Ve
n
k
a
tes
wa
ra
Un
iv
e
rsity
,
Ti
ru
p
a
ti
.
He
h
a
s
p
u
b
li
sh
e
d
m
o
re
th
a
n
1
2
p
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p
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tern
a
ti
o
n
a
l,
n
a
ti
o
n
a
l
j
o
u
r
n
a
ls.
His
C
u
rre
n
t
a
re
a
o
f
i
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tere
st
in
c
l
u
d
e
s
m
a
n
e
ts,
a
rti
ficia
l
lea
rn
in
g
,
a
n
d
m
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c
h
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rn
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g
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c
a
n
b
e
c
o
n
tac
ted
a
t
e
m
a
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:
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a
su
sirisa
la@
g
m
a
il
.
c
o
m
.
Dr
.
N
a
la
v
a
l
a
Ra
m
a
n
j
a
n
e
y
a
R
e
d
d
y
h
a
s
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o
m
p
lete
d
h
is
P
h
.
D
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in
C
S
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fr
o
m
JN
TUA,
An
a
n
t
h
a
p
u
ra
m
u
.
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h
a
s
m
o
re
t
h
a
n
1
4
y
e
a
rs
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f
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c
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x
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m
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rn
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,
h
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o
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tain
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d
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ten
ts
o
n
h
is
wo
r
k
.
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re
se
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h
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re
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s
in
c
lu
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c
o
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p
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ter
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two
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k
s,
d
a
ta
sc
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c
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n
d
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rti
f
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telli
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.
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c
a
n
b
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c
o
n
tac
ted
a
t
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m
a
il
:
n
a
lav
a
la.ram
a
n
ji
@g
m
a
il
.
c
o
m
.
S
y
e
d
A
n
ish
a
c
u
rre
n
tl
y
st
u
d
y
in
g
M
.
Tec
h
.
i
n
KLM
C
o
ll
e
g
e
o
f
E
n
g
in
e
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rin
g
f
o
r
Wo
m
e
n
,
s
h
e
h
a
d
c
o
m
p
lete
d
m
y
B.
Tec
h
.
in
t
h
e
sp
e
c
ializa
ti
o
n
o
f
Co
m
p
u
ter
S
c
ien
c
e
a
n
d
in
En
g
i
n
e
e
rin
g
(C
S
E)
in
KSR
M
Co
l
leg
e
o
f
En
g
in
e
e
rin
g
(Au
t
o
n
o
m
o
u
s),
Ka
d
a
p
a
,
An
d
h
ra
P
ra
d
e
sh
,
In
d
ia.
He
r
re
se
a
rc
h
a
re
a
s
o
f
i
n
tres
t
a
re
b
l
o
c
k
c
h
a
in
tec
h
n
o
l
o
g
y
,
m
a
c
h
in
e
lea
rn
i
n
g
,
a
n
d
P
y
t
h
o
n
.
S
h
e
c
a
n
b
e
c
o
n
tac
ted
a
t
e
m
a
il
:
a
n
i
sh
a
sy
e
d
4
6
5
@g
m
a
il
.
c
o
m
.
Evaluation Warning : The document was created with Spire.PDF for Python.