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nfo
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m
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J
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CT
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l.
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3
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ttp
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m
Adv
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h as
y
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k
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ex
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ha
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y:
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2
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ev
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y
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8
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u
l 5
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6
Wh
e
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c
re
a
ti
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c
o
m
m
u
n
ica
ti
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n
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ste
m
s,
se
c
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d
a
ta
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c
r
u
c
ial
a
n
d
imp
ro
v
e
d
ra
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d
o
m
iza
ti
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n
in
c
re
a
ti
n
g
se
c
re
t
k
e
y
s
c
o
n
tri
b
u
tes
t
o
m
o
re
se
c
u
re
sy
ste
m
s.
Un
fo
rt
u
n
a
tel
y
,
th
e
sy
m
m
e
tri
c
c
ip
h
e
rs
u
se
d
f
o
r
d
a
ta
e
n
c
ry
p
ti
o
n
,
su
c
h
a
s
th
e
a
d
v
a
n
c
e
d
e
n
c
ry
p
ti
o
n
sta
n
d
a
rd
(AE
S
),
m
a
y
b
e
su
b
jec
t
to
a
tt
a
c
k
s
th
a
t
e
x
p
l
o
it
t
imin
g
m
e
a
su
re
m
e
n
ts
to
d
e
d
u
c
e
th
e
se
c
re
t
k
e
y
u
se
d
fo
r
e
n
c
ry
p
ti
o
n
,
re
su
lt
i
n
g
i
n
a
si
g
n
if
ica
n
t
lac
k
o
f
re
se
a
rc
h
o
n
t
h
e
s
e
c
u
rit
y
o
f
h
y
b
rid
imp
lem
e
n
tatio
n
s
(
u
su
a
l
ly
d
e
fin
e
d
a
s
i
n
c
o
rp
o
ra
ti
n
g
AES
a
n
d
a
sy
m
m
e
tri
c
c
ip
h
e
rs)
fo
r
AES
e
n
c
ry
p
ti
o
n
.
We
in
tr
o
d
u
c
e
a
n
e
w
h
y
b
ri
d
e
n
c
ry
p
ti
o
n
m
e
th
o
d
t
h
a
t
c
o
m
b
in
e
s
th
e
AE
S
e
n
c
r
y
p
ti
o
n
sta
n
d
a
rd
wi
th
e
ll
i
p
ti
c
c
u
rv
e
c
ry
p
to
g
ra
p
h
y
(ECC).
In
th
is
h
y
b
rid
fo
rm
o
f
e
n
c
ry
p
ti
o
n
,
ECC
is
u
ti
li
z
e
d
to
fa
c
il
it
a
te
se
c
u
re
e
n
c
ry
p
ti
o
n
a
n
d
tran
sm
issio
n
o
f
t
h
e
AE
S
k
e
y
a
n
d
c
y
c
le
th
ro
u
g
h
1
6
ro
u
n
d
s
o
f
AE
S
to
e
n
c
ry
p
t
th
e
m
a
jo
ri
ty
o
f
th
e
d
a
ta.
We
p
ro
v
id
e
a
p
e
rfo
rm
a
n
c
e
c
o
m
p
a
riso
n
b
e
twe
e
n
th
e
n
e
w
a
lg
o
rit
h
m
a
n
d
th
e
AES
-
1
2
8
e
n
c
ry
p
ti
o
n
sta
n
d
a
rd
.
O
u
r
fin
d
i
n
g
s
in
d
ica
te
th
a
t
th
e
n
e
w
h
y
b
ri
d
e
n
c
ry
p
ti
o
n
m
e
th
o
d
p
r
o
d
u
c
e
d
a
n
a
v
e
ra
g
e
e
n
c
ry
p
ti
o
n
ti
m
e
o
f
0
.
0
0
0
2
se
c
o
n
d
s
fo
r
1
0
M
B
fil
e
s,
sig
n
if
ica
n
tl
y
fa
st
e
r
th
a
n
th
e
AES
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n
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ry
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ti
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n
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a
rd
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ich
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n
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v
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ra
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o
f
0
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0
0
1
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se
c
o
n
d
s.
T
h
e
n
e
w
h
y
b
r
id
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e
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o
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e
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it
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n
ifi
c
a
n
t
re
sista
n
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e
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r
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tan
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ly
ti
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a
l
a
tt
e
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ts,
e
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g
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wh
il
e
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a
in
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g
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h
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AES
n
o
n
l
in
e
a
ri
ty
v
a
lu
e
a
t
1
1
2
.
As
s
u
c
h
,
we
c
o
n
c
lu
si
v
e
ly
st
a
te
th
a
t
t
h
e
n
e
w
h
y
b
rid
e
n
c
ry
p
ti
o
n
m
e
th
o
d
u
ti
li
z
i
n
g
ECC
a
n
d
AES
wil
l
p
r
o
v
id
e
e
ffe
c
ti
v
e
se
c
u
rit
y
f
o
r
u
se
r
d
a
ta
a
g
a
in
st
ti
m
in
g
si
d
e
-
c
h
a
n
n
e
l
a
tt
a
c
k
s
w
h
il
e
re
m
a
in
in
g
a
n
e
fficie
n
t
m
e
th
o
d
fo
r
p
e
rfo
rm
in
g
e
n
c
ry
p
ti
o
n
.
K
ey
w
o
r
d
s
:
Ad
v
an
ce
d
e
n
cr
y
p
tio
n
s
tan
d
ar
d
C
r
y
p
to
g
r
ap
h
y
D
e
c
r
y
p
t
i
o
n
E
llip
tic
cu
r
v
e
en
c
r
y
p
tio
n
E
n
cr
y
p
tio
n
S
ec
u
r
ity
T
h
is i
s
a
n
o
p
e
n
a
c
c
e
ss
a
rticle
u
n
d
e
r th
e
CC B
Y
-
SA
li
c
e
n
se
.
C
o
r
r
e
s
p
o
nd
ing
A
uth
o
r
:
R
av
in
d
r
a
K
R
ed
d
y
Dep
ar
tm
en
t o
f
E
C
E
,
VI
STAS
C
h
en
n
ai,
T
am
il Na
d
u,
I
n
d
ia
E
m
ail:
r
av
in
d
r
a.
k
alv
ap
alli@
g
m
ail.
co
m
1.
I
NT
RO
D
UCT
I
O
N
I
n
f
o
r
m
atio
n
s
ec
u
r
ity
is
a
k
ey
f
ac
to
r
in
th
e
g
r
o
wth
o
f
e
-
co
m
m
er
ce
an
d
th
e
p
r
o
tectio
n
o
f
d
ata.
C
r
y
p
to
g
r
ap
h
y
is
a
m
ea
n
s
t
o
p
r
o
tect
d
ata
[
1
]
.
W
e
m
a
in
tain
an
d
co
n
tr
o
l
th
e
c
o
n
f
i
d
en
tiality
o
f
d
ata,
an
d
th
e
ad
v
an
ce
d
en
cr
y
p
tio
n
s
tan
d
ar
d
(
AE
S
)
is
a
c
o
m
m
o
n
s
tan
d
ar
d
in
t
h
ese
s
c
en
ar
io
s
[
2
]
.
Sy
m
m
etr
ic
k
e
y
en
cr
y
p
tio
n
is
ca
p
ab
le
o
f
h
an
d
lin
g
lar
g
e
am
o
u
n
ts
o
f
p
lain
tex
t.
T
h
e
k
ey
m
an
a
g
em
en
t
s
ch
e
m
e
o
f
ellip
tic
cu
r
v
e
en
cr
y
p
tio
n
(
E
C
C
)
m
ak
es
it
m
o
r
e
v
iab
le
f
o
r
k
ey
en
cr
y
p
tio
n
an
d
d
ig
ital
s
ig
n
atu
r
es,
wh
ich
is
wh
y
th
e
p
ap
er
p
r
o
p
o
s
es
a
h
y
b
r
id
m
o
d
el.
T
h
e
p
r
o
p
o
s
ed
m
eth
o
d
u
s
es
E
C
C
o
r
to
s
en
d
an
d
en
cr
y
p
t
k
ey
s
to
an
AE
S
w
ith
a
s
y
m
m
etr
ic
s
ch
em
e.
T
h
e
ap
p
r
o
ac
h
r
elate
d
to
s
id
e
-
ch
an
n
el
attac
k
s
r
elies
o
n
ex
p
lo
itin
g
p
r
o
b
lem
s
with
th
e
ex
ec
u
ti
o
n
o
f
th
e
alg
o
r
ith
m
(
s
)
r
ath
er
th
a
n
th
e
m
ath
em
atica
l
ex
p
l
o
itatio
n
o
f
th
e
al
g
o
r
ith
m
th
r
o
u
g
h
s
tan
d
ar
d
cr
y
p
ta
n
aly
s
is
.
Sid
e
-
ch
an
n
el
attac
k
s
tak
e
ad
v
an
tag
e
o
f
in
f
o
r
m
atio
n
leak
e
d
f
r
o
m
tim
in
g
,
r
ad
iatio
n
em
is
s
io
n
s
,
p
o
wer
u
s
ag
e,
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
2
5
2
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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
2
6
3
-
1
2
7
1
1264
ca
ch
e
co
n
ten
t
,
an
d
o
t
h
er
n
o
n
-
m
ath
em
atica
l
s
o
u
r
ce
s
.
I
n
t
h
e
ca
s
e
o
f
AE
S,
th
is
is
p
r
i
m
ar
ily
ac
co
m
p
lis
h
ed
t
h
r
o
u
g
h
th
e
u
s
e
o
f
m
u
ltip
le
ta
b
le
lo
o
k
u
p
s
,
wh
er
e
ea
ch
lo
o
k
u
p
p
r
o
v
id
es
a
q
u
ick
m
eth
o
d
o
f
p
r
o
ce
s
s
in
g
a
n
AE
S
o
p
er
atio
n
,
an
d
th
ese
ar
e
ca
lled
tab
le
"h
its
".
T
h
e
h
its
ca
n
s
witch
b
etwe
en
a
h
it
in
th
e
ca
c
h
e
an
d
a
m
is
s
in
th
e
ca
ch
e
d
e
p
en
d
in
g
u
p
o
n
th
e
s
o
u
r
ce
o
f
th
e
i
n
f
o
r
m
atio
n
(
th
e
p
l
ain
tex
t)
an
d
th
e
k
ey
(
th
e
s
ec
r
et
k
ey
)
th
at
is
in
p
u
t
to
th
e
AE
S
en
cr
y
p
tio
n
s
ch
e
m
e
[
3
]
.
T
h
u
s
,
b
ec
au
s
e
s
id
e
-
ch
an
n
el
attac
k
s
d
ep
en
d
o
n
c
o
r
r
elatin
g
th
e
d
ata
t
h
at
h
as
b
ee
n
leak
e
d
an
d
th
e
s
en
s
itiv
e
d
ata
(
w
h
ich
h
as
n
o
t
b
ee
n
leak
ed
)
,
co
m
m
o
n
c
o
u
n
te
r
m
ea
s
u
r
es
to
th
ese
attac
k
s
ca
n
b
e
p
lace
d
in
to
two
ca
te
g
o
r
ies
[
4
]
:
eith
er
t
h
e
leak
ag
e
o
f
th
e
d
ata
ca
n
b
e
p
r
ev
e
n
ted
,
o
r
th
e
r
elatio
n
s
h
ip
b
etwe
en
th
e
two
ca
n
b
e
elim
in
ated
[
5
]
.
T
h
e
p
u
r
p
o
s
e
o
f
th
is
s
tu
d
y
is
to
cr
ea
te
a
v
iab
le
s
o
lu
tio
n
f
o
r
ad
d
r
ess
in
g
th
e
d
at
a
s
ec
u
r
ity
is
s
u
es/p
r
o
b
lem
s
p
r
esen
ted
b
y
alg
o
r
ith
m
s
wh
ich
ar
e
im
p
ac
te
d
b
y
Sid
e
C
h
a
n
n
el
Attack
s
.
I
n
o
th
e
r
wo
r
d
s
,
we
in
ten
d
to
u
tili
ze
E
C
C
tech
n
o
lo
g
y
to
c
r
ea
te
an
o
b
f
u
s
ca
ted
AE
S
Key
,
s
o
th
at
th
er
e
will
b
e
n
o
r
eq
u
ir
em
en
t
to
s
en
d
(
tr
an
s
m
it)
a
p
r
iv
ate
s
ec
r
et
k
ey
p
r
io
r
to
ex
c
h
an
g
i
n
g
th
e
o
b
f
u
s
ca
ted
AE
S
Key
.
T
h
e
co
m
b
in
atio
n
o
f
u
s
in
g
an
AE
S
-
E
C
C
Hy
b
r
id
C
ip
h
er
will
n
o
t
o
n
ly
p
r
o
v
id
e
a
m
et
h
o
d
f
o
r
ad
d
r
ess
in
g
d
ata
s
ec
u
r
ity
is
s
u
es
b
u
t
will
also
s
im
p
lify
th
e
m
an
ag
em
e
n
t
o
f
k
ey
s
f
o
r
co
m
m
u
n
icatio
n
s
y
s
t
em
s
[
6
]
.
T
h
is
r
esear
ch
'
s
m
ain
g
o
al
is
to
cr
ea
te
a
Hy
b
r
id
E
n
cr
y
p
tio
n
Alg
o
r
ith
m
co
m
b
in
in
g
AE
S
&
E
C
C
.
T
h
e
C
o
m
b
in
er
h
as
en
cr
y
p
ted
k
e
y
s
th
at
f
ac
ilit
ate
a
s
ec
u
r
e
k
ey
e
x
ch
an
g
e,
p
r
o
v
id
i
n
g
an
ad
d
ed
lev
el
o
f
p
r
o
tectio
n
o
f
th
e
ci
p
h
er
tex
t
g
en
er
ate
d
[
7
]
;
th
e
r
esear
ch
will
also
cr
ea
te
C
ac
h
e
T
im
in
g
Attack
s
to
id
en
tif
y
ch
allen
g
es
an
d
p
r
o
v
id
e
C
o
u
n
ter
m
ea
s
u
r
es.
T
o
R
ed
u
ce
W
o
r
k
lo
a
d
wh
en
u
s
in
g
f
r
o
n
t
-
en
d
f
u
n
ctio
n
s
,
en
cr
y
p
t
o
n
l
y
th
e
k
ey
u
s
ed
to
ex
ec
u
te
AE
S
an
d
n
o
t
th
e
e
n
tir
e
d
ata
b
lo
ck
u
s
in
g
E
C
C
.
T
h
e
p
r
o
ject
also
ex
am
in
es
T
im
in
g
-
b
ased
C
o
u
n
te
r
m
ea
s
u
r
es
f
o
r
n
eu
t
r
alizin
g
s
id
e
-
c
h
a
n
n
el
tim
in
g
attac
k
s
th
at
co
u
ld
p
r
o
v
i
d
e
ac
ce
s
s
to
th
e
k
ey
s
u
s
ed
to
e
n
cr
y
p
t th
e
d
ata
.
2.
RE
L
AT
E
D
WO
RK
S
T
h
er
e
h
av
e
b
ee
n
m
an
y
s
tu
d
ie
s
o
n
th
e
Secu
r
ity
o
f
th
e
AE
S
an
d
its
I
m
p
lem
en
tatio
n
in
th
e
c
lo
u
d
an
d
th
e
i
n
ter
n
et
o
f
t
h
i
n
g
s
(
I
o
T
)
.
I
n
th
e
last
s
ev
er
al
y
ea
r
s
,
a
co
m
p
r
eh
en
s
iv
e
r
e
v
iew
o
f
th
e
lit
er
atu
r
e
h
as
in
d
icate
d
th
at
alth
o
u
g
h
AE
S
co
n
tin
u
es
to
b
e
th
e
s
tan
d
ar
d
f
o
r
s
y
m
m
etr
ic
en
cr
y
p
tio
n
,
it
co
n
tin
u
es
to
b
e
m
o
r
e
lik
ely
to
b
e
ex
p
lo
ited
th
r
o
u
g
h
s
id
e
ch
a
n
n
el
attac
k
s
wh
en
im
p
lem
en
ted
in
h
ar
d
war
e
-
s
h
a
r
in
g
en
v
ir
o
n
m
en
ts
[
8
]
.
C
ac
h
e
tim
in
g
attac
k
s
e
x
p
lo
it
th
e
r
elatio
n
s
h
ip
b
etwe
en
th
e
tim
e
r
eq
u
ir
ed
to
e
n
cr
y
p
t
d
ata
an
d
th
e
ca
c
h
e
h
its
/m
is
s
e
s
;
th
u
s
,
d
ed
u
cin
g
th
e
p
r
iv
ate
k
ey
.
T
h
e
f
u
n
d
am
en
t
al
s
tu
d
ies
h
av
e
in
d
icate
d
th
at
th
e
v
u
ln
e
r
a
b
ilit
ies
h
ig
h
lig
h
ted
ab
o
v
e
e
x
is
t
b
ec
au
s
e
th
e
tab
le
lo
o
k
-
u
p
p
r
o
ce
s
s
will
o
v
er
f
lo
w
t
h
e
s
ize
o
f
ca
c
h
e
m
em
o
r
y
;
a
n
d
,
as
s
u
ch
,
th
e
tim
e
it
tak
es
to
p
e
r
f
o
r
m
l
o
o
k
u
p
s
will
d
ep
en
d
o
n
th
e
ty
p
e
o
f
tex
t
&
k
ey
u
s
ed
in
en
cr
y
p
tio
n
[
9
]
.
I
n
ad
d
itio
n
,
v
ar
io
u
s
r
esear
c
h
er
s
h
av
e
d
em
o
n
s
tr
ated
h
o
w
d
ee
p
lear
n
in
g
m
o
d
els
ef
f
icien
tly
cr
ea
te
AE
S
s
id
e
-
ch
an
n
el
attac
k
v
ec
t
o
r
s
[
1
0
]
,
[
1
1
]
.
T
h
is
p
r
o
v
es
th
at
o
n
a
s
tan
d
ar
d
lev
el,
AE
S
im
p
lem
en
tatio
n
s
n
ee
d
tr
em
en
d
o
u
s
h
ar
d
e
n
in
g
f
r
o
m
co
n
tem
p
o
r
ar
y
cr
y
p
tan
aly
s
is
m
eth
o
d
s
.
R
esear
ch
er
s
h
a
v
e
tu
r
n
ed
to
h
y
b
r
i
d
cr
y
p
to
s
y
s
tem
s
as
th
e
s
o
lu
tio
n
f
o
r
m
itig
atin
g
v
u
ln
er
ab
ilit
ies.
Sev
er
al
in
itial
p
r
o
p
o
s
als
f
o
r
h
y
b
r
id
e
n
cr
y
p
tio
n
alg
o
r
ith
m
s
co
m
b
in
ed
th
e
im
p
r
o
v
e
d
p
e
r
f
o
r
m
an
ce
o
f
AE
S
with
th
e
s
ec
u
r
ity
ad
v
a
n
tag
e
o
f
E
C
C
,
th
er
e
b
y
en
h
an
cin
g
p
er
f
o
r
m
an
c
e
an
d
s
ec
u
r
ity
.
Mo
r
e
r
ec
e
n
tly
,
th
er
e
h
av
e
b
ee
n
s
ev
e
r
al
s
tu
d
ies
f
o
cu
s
in
g
o
n
clo
u
d
s
to
r
ag
e
ap
p
licatio
n
s
.
Stu
d
ies
o
n
o
r
ac
le
clo
u
d
in
f
r
astru
ctu
r
e,
f
o
r
ex
am
p
le,
h
a
v
e
s
h
o
wn
th
at
co
m
b
i
n
in
g
a
s
y
m
m
etr
ic
s
p
ee
d
ad
v
a
n
tag
e
with
an
asy
m
m
etr
ic
k
e
y
ex
ch
an
g
e
s
ig
n
if
ican
tly
b
o
o
s
ts
th
r
o
u
g
h
p
u
t
[
1
2
]
.
Valid
atio
n
ef
f
o
r
ts
m
ad
e
o
n
v
ar
io
u
s
in
tellig
en
t
i
n
f
o
r
m
atio
n
s
er
v
ices
p
latf
o
r
m
s
h
av
e
p
r
o
v
en
to
en
h
a
n
ce
th
e
s
ec
u
r
ity
o
f
co
m
m
u
n
icatio
n
with
o
u
t
r
e
q
u
ir
in
g
th
e
co
n
s
u
m
p
ti
o
n
o
f
c
o
m
p
u
tatio
n
al
p
o
wer
n
e
ed
ed
to
im
p
lem
e
n
t
a
f
u
ll
-
b
lo
wn
p
u
b
lic
k
ey
in
f
r
astru
ctu
r
e
s
y
s
te
m
[
1
3
]
.
T
h
er
e
is
ev
id
en
ce
th
at
h
y
b
r
id
AE
S
-
E
C
C
im
p
lem
en
tatio
n
s
im
p
r
o
v
e
d
ata
s
ec
u
r
ity
,
in
ad
d
i
tio
n
to
im
p
r
o
v
in
g
th
r
o
u
g
h
p
u
t,
s
p
ec
if
ically
in
clo
u
d
s
to
r
ag
e
en
v
ir
o
n
m
en
ts
[
1
4
]
.
Un
f
o
r
tu
n
atel
y
,
Hy
b
r
id
So
lu
tio
n
s
h
av
e
h
ig
h
laten
cies
wh
e
n
ap
p
lied
to
lar
g
e
d
atasets
o
r
r
e
s
o
u
r
ce
-
co
n
s
tr
ain
e
d
d
ev
ices.
As
m
en
tio
n
ed
ea
r
lie
r
,
s
tan
d
ar
d
AE
S
im
p
lem
en
tat
io
n
s
u
s
e
a
1
2
8
-
b
it
k
ey
f
o
r
tr
e
s
s
an
d
em
p
lo
y
ten
r
o
u
n
d
s
o
f
en
cr
y
p
tio
n
;
h
o
wev
e
r
,
attem
p
ts
m
ad
e
in
th
e
p
ast
to
in
cr
ea
s
e
th
e
s
ec
u
r
ity
lev
el
o
f
AE
S
b
y
in
cr
ea
s
in
g
th
e
s
ize
o
f
th
e
k
ey
o
r
n
u
m
b
e
r
o
f
r
o
u
n
d
s
(
i.e
.
,
1
9
2
b
its
)
p
r
i
m
ar
ily
h
av
e
r
esu
lted
in
u
n
ac
c
ep
tab
le
p
er
f
o
r
m
an
ce
d
r
o
p
s
o
n
8
-
b
it
an
d
/o
r
leg
ac
y
m
icr
o
co
n
tr
o
ller
s
[
1
5
]
.
3.
M
E
T
H
O
D
T
h
e
h
y
b
r
id
AE
S
-
E
C
C
alg
o
r
i
th
m
aim
s
to
o
f
f
er
a
two
-
p
r
o
n
g
ed
s
ec
u
r
ity
m
ec
h
a
n
is
m
th
at
aid
s
in
p
r
o
tectin
g
b
o
th
th
e
m
ess
ag
e
co
n
ten
t
an
d
th
e
en
c
r
y
p
tio
n
k
ey
s
.
T
h
e
h
y
b
r
i
d
m
eth
o
d
u
s
es
th
e
ad
v
an
tag
es
o
f
s
y
m
m
etr
ic
an
d
asy
m
m
etr
ic
c
r
y
p
to
g
r
ap
h
y
in
tan
d
em
to
les
s
en
th
e
p
r
o
ce
s
s
in
g
b
u
r
d
en
th
at
g
o
es
alo
n
g
with
im
p
lem
en
tin
g
p
u
b
lic
-
k
e
y
in
f
r
astru
ctu
r
es.
T
h
e
s
eq
u
e
n
ce
o
f
o
p
er
atio
n
al
f
lo
w
en
c
o
m
p
as
s
in
g
th
e
p
r
o
p
o
s
ed
m
eth
o
d
is
en
clo
s
ed
in
th
e
s
tep
p
in
g
p
r
o
ce
d
u
r
e
b
elo
w
,
an
d
t
h
e
tr
an
s
itio
n
f
r
o
m
p
lain
tex
t to
t
h
e
f
in
al
cip
h
er
b
lo
ck
is
also
o
u
tlin
ed
.
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
d
va
n
ce
d
en
cryp
tio
n
s
ta
n
d
a
r
d
w
ith
a
s
ymm
etri
c
ke
y
ex
ch
a
n
g
e
fo
r
text
en
cryp
tio
n
…
(
R
a
vi
n
d
r
a
K
R
ed
d
y
)
1265
3
.
1
.
T
he
pro
po
s
ed
re
s
ea
rc
h e
nco
m
pa
s
s
es t
he
f
o
llo
wing
key
a
s
pect
s
AE
S
em
p
lo
y
s
s
u
b
s
titu
tio
n
an
d
p
er
m
u
tatio
n
n
etwo
r
k
s
.
T
h
e
d
ata
b
lo
ck
s
ca
n
b
e
m
o
d
if
ied
t
o
s
p
ec
if
ic
len
g
th
s
.
AE
S
allo
ws
th
r
ee
k
ey
len
g
th
s
.
T
h
e
n
u
m
b
er
o
f
b
its
c
o
r
r
esp
o
n
d
s
to
th
e
n
u
m
b
e
r
o
f
it
er
atio
n
s
:
1
0
,
1
2
,
o
r
1
4
r
o
u
n
d
s
,
r
esp
ec
tiv
ely
.
T
h
e
AE
S
s
tr
u
ctu
r
e
ca
n
b
e
u
n
d
e
r
s
to
o
d
b
ased
o
n
t
h
r
ee
b
asic
co
m
p
o
n
e
n
ts
:
Key
ex
p
an
s
io
n
,
r
o
u
n
d
tr
an
s
f
o
r
m
ati
o
n
,
an
d
iter
atio
n
.
E
ac
h
r
o
u
n
d
tr
an
s
f
o
r
m
atio
n
was
co
m
p
r
is
ed
o
f
th
r
ee
lay
er
s
:
a
non
-
lin
ea
r
lay
er
,
a
lin
e
ar
m
ix
i
n
g
lay
er
,
an
d
a
n
ad
d
-
r
o
u
n
d
k
e
y
lay
er
.
T
h
e
en
tire
p
r
o
ce
s
s
is
s
h
o
wn
in
Fig
u
r
e
1
.
E
v
er
y
c
y
cle
co
m
p
r
is
es th
e
s
u
b
s
eq
u
en
t set o
f
f
o
u
r
p
r
o
ce
d
u
r
es
:
−
Su
b
b
y
tes
tr
an
s
f
o
r
m
atio
n
:
T
h
e
s
u
b
s
titu
tio
n
b
o
x
tak
es
ea
ch
b
y
te
f
r
o
m
th
e
s
tate
m
atr
ix
with
an
alter
n
ativ
e
b
y
te.
T
h
e
a
p
p
licatio
n
o
f
an
af
f
in
e
tr
an
s
f
o
r
m
atio
n
is
n
ee
d
ed
to
estab
lis
h
th
e
S
-
box.
−
Sh
if
t
r
o
ws
tr
an
s
f
o
r
m
atio
n
:
T
h
e
f
ir
s
t
r
o
ws
o
f
th
e
s
tate’
s
b
y
tes
r
em
ain
th
e
s
am
e.
T
h
e
s
ec
o
n
d
,
th
ir
d
,
f
o
u
r
th
,
an
d
f
if
th
r
o
w
h
a
v
e
lef
t sh
if
ts
o
f
o
n
e,
two
,
th
r
ee
,
an
d
f
o
u
r
b
y
t
es.
−
Mix
co
lu
m
n
s
tr
an
s
f
o
r
m
atio
n
:
I
n
th
is
p
h
ase,
th
e
b
y
tes
in
ea
ch
co
lu
m
n
ar
e
c
o
m
b
in
e
d
t
o
p
er
f
o
r
m
s
tate
m
u
ltip
licatio
n
.
T
h
e
cip
h
er
te
x
t'
s
ar
r
an
g
em
en
t
is
alter
ed
ev
en
if
all
th
e
b
y
tes
ar
e
th
e
s
am
e.
T
h
e
Mix
C
o
lu
m
n
s
o
p
er
atio
n
o
f
s
tep
2
d
o
es n
o
t h
av
e
a
n
in
v
er
s
e
p
o
ly
n
o
m
ial
m
atr
ix
.
−
Ad
d
r
o
u
n
d
k
ey
tr
a
n
s
f
o
r
m
atio
n
:
T
h
is
tr
an
s
f
o
r
m
atio
n
in
v
o
l
v
es
in
co
r
p
o
r
atin
g
a
r
o
u
n
d
k
e
y
in
to
th
e
s
tate
th
r
o
u
g
h
a
b
itwis
e
XOR
o
p
er
atio
n
.
T
h
is
p
r
o
ce
s
s
is
ex
ec
u
ted
s
eg
m
en
t
b
y
s
eg
m
en
t
.
Ad
d
itio
n
ally
,
ea
ch
s
tate
in
th
e
co
lu
m
n
m
atr
ix
is
co
m
b
in
ed
with
a
r
o
u
n
d
k
e
y
wo
r
d
.
T
h
is
f
in
al
s
tag
e
o
f
AE
S
e
n
tails
a
m
atr
ix
ad
d
itio
n
o
p
er
atio
n
.
Fig
u
r
e
1
.
B
asic o
p
er
atio
n
o
f
t
h
e
ad
v
an
ce
d
en
cr
y
p
tio
n
s
tan
d
ar
d
3
.
1
.
1
.
T
he
pro
po
s
ed
re
s
ea
rc
h
enco
m
pa
s
s
es t
he
f
o
llo
wing
key
a
s
pect
s
i)
E
n
h
a
n
ce
d
AE
S
alg
o
r
ith
m
i
m
p
lem
en
tatio
n
,
t
h
e
AE
S
is
a
s
y
m
m
etr
ic
en
c
r
y
p
tio
n
ca
lcu
lati
o
n
,
u
tili
ze
s
a
p
r
o
g
r
ess
io
n
o
f
tab
le
lo
o
k
-
u
p
s
to
im
p
r
o
v
e
its
p
er
f
o
r
m
a
n
ce
.
Ho
wev
er
,
th
ese
tab
les
ex
ce
ed
th
e
ca
ch
e'
s
ca
p
ac
ity
,
lead
in
g
to
ca
ch
e
h
it
s
an
d
m
is
s
es
d
u
r
in
g
en
cr
y
p
ti
o
n
.
T
h
is
,
in
tu
r
n
,
r
esu
lts
in
v
a
r
y
in
g
lo
o
k
u
p
tim
es
an
d
e
n
cr
y
p
tio
n
d
u
r
atio
n
s
th
at
ar
e
in
f
lu
e
n
ce
d
b
y
b
o
th
t
h
e
in
p
u
t
tex
t
an
d
th
e
en
cr
y
p
tio
n
k
ey
.
T
h
ese
attr
ib
u
tes
m
ak
e
AE
S
s
u
s
ce
p
tib
le
to
C
ac
h
e
T
im
in
g
Attack
s
,
wh
ich
ex
p
lo
it
th
e
co
r
r
elatio
n
b
etwe
en
tim
in
g
p
atter
n
s
f
o
r
en
cr
y
p
t
io
n
u
n
d
er
k
n
o
wn
an
d
u
n
k
n
o
wn
k
e
y
s
to
d
ed
u
ce
th
e
u
n
k
n
o
wn
k
e
y
.
ii
)
Hy
b
r
id
AE
S
-
E
C
C
en
cr
y
p
tio
n
s
c
h
e
m
e
,
t
h
is
wo
r
k
p
r
o
p
o
s
es
an
au
g
m
e
n
ted
AE
S
alg
o
r
it
h
m
f
o
r
p
lain
te
x
t
en
cr
y
p
tio
n
.
Fu
r
t
h
er
m
o
r
e
,
th
e
E
C
C
alg
o
r
ith
m
will
be
u
tili
ze
d
to
en
c
r
y
p
t
th
e
AE
S
k
ey
.
T
h
is
d
u
al
-
lay
er
en
cr
y
p
tio
n
s
tr
ateg
y
en
h
an
ce
s
th
e
o
v
er
all
s
ec
u
r
ity
of
th
e
s
y
s
tem
.
T
h
e
k
ey
o
b
jectiv
e
is
to
f
o
r
tify
th
e
s
y
s
tem
ag
ai
n
s
t
p
o
te
n
tial
v
u
ln
er
ab
ilit
ies
s
tem
m
in
g
f
r
o
m
tim
i
n
g
s
id
e
c
h
an
n
el
attac
k
s
.
iii)
So
f
twar
e
-
b
ased
c
o
u
n
t
e
r
m
e
a
s
u
r
e
s
,
t
o
m
itig
ate
th
e
p
o
ten
tial
wea
k
n
ess
es
p
r
esen
ted
by
ti
m
in
g
s
id
e
c
h
an
n
el
ass
au
lts
,
th
is
r
esear
ch
aim
s
to
im
p
le
m
en
t
s
o
f
twar
e
-
b
ased
co
u
n
ter
m
ea
s
u
r
es.
T
h
ese
co
u
n
ter
m
ea
s
u
r
es
will
b
e
s
tr
ateg
ically
d
esig
n
ed
a
n
d
in
te
g
r
ated
in
to
th
e
s
y
s
tem
to
s
af
eg
u
ar
d
a
g
ain
s
t
th
e
e
x
p
lo
it
atio
n
o
f
tim
in
g
-
r
elate
d
v
u
l
n
e
r
a
b
i
l
i
ti
e
s
.
i
v
)
E
n
h
an
ce
d
ef
f
icien
cy
th
r
o
u
g
h
h
ig
h
e
r
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
2
5
2
-
8
7
7
6
I
n
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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
2
6
3
-
1
2
7
1
1266
o
r
d
er
A
E
S
,
t
o
o
p
tim
ize
th
e
ef
f
icien
cy
o
f
d
ata
en
cr
y
p
tio
n
,
a
n
ad
v
an
ce
d
v
e
r
s
io
n
o
f
AE
S
will
be
em
p
lo
y
ed
.
T
h
is
h
ig
h
er
-
o
r
d
er
AE
S
v
ar
iatio
n
will
h
ig
h
lig
h
t
a
b
ig
g
er
k
ey
s
ize
o
f
1
9
2
p
iece
s
an
d
in
clu
d
e
1
6
r
o
u
n
d
s
o
f
em
p
h
ases
,
as
o
p
p
o
s
ed
to
th
e
s
tan
d
ar
d
AE
S
m
o
d
el,
wh
ich
h
a
s
a
cr
itical
s
ize
o
f
1
2
8
p
iece
s
an
d
1
0
r
o
u
n
d
s
o
f
cy
cles.
R
ec
en
t
h
y
b
r
id
AE
S
-
E
C
C
im
p
lem
en
tatio
n
s
d
em
o
n
s
tr
ate
im
p
r
o
v
ed
d
ata
s
ec
u
r
ity
an
d
th
r
o
u
g
h
p
u
t
in
clo
u
d
s
to
r
ag
e
ap
p
licatio
n
s
.
T
h
i
s
en
h
an
ce
d
AE
S
co
n
f
ig
u
r
atio
n
aim
s
to
f
u
r
th
e
r
elev
at
e
th
e
s
ec
u
r
ity
an
d
ef
f
icien
cy
o
f
th
e
en
cr
y
p
tio
n
p
r
o
ce
s
s
.
T
h
e
p
r
o
p
o
s
ed
r
esear
ch
will
c
o
n
tr
ib
u
te
to
th
e
ad
v
a
n
ce
m
en
t
of
en
cr
y
p
tio
n
tech
n
iq
u
es
b
y
co
m
b
in
in
g
an
im
p
r
o
v
e
d
AE
S
al
g
o
r
ith
m
,
E
C
C
f
o
r
k
ey
en
cr
y
p
tio
n
,
an
d
ef
f
ec
tiv
e
s
o
f
twar
e
-
b
ased
co
u
n
ter
m
ea
s
u
r
es.
Mo
r
eo
v
er
,
th
e
i
n
tr
o
d
u
ctio
n
o
f
a
h
ig
h
er
-
o
r
d
er
AE
S
v
ar
ia
n
t
is
an
ticip
ated
to
p
r
o
v
id
e
en
h
a
n
ce
d
s
ec
u
r
ity
a
n
d
ef
f
icien
cy
f
o
r
d
ata
en
cr
y
p
tio
n
.
3
.
2
.
P
r
o
po
s
ed
a
lg
o
rit
hm
a.
T
h
e
u
s
er
'
s
in
ten
d
ed
d
ata
b
lo
c
k
u
n
d
er
g
o
es
en
cr
y
p
tio
n
to
e
n
s
u
r
e
s
e
c
u
r
i
t
y
.
b.
T
h
e
d
ata
en
cr
y
p
tio
n
em
p
l
o
y
s
t
h
e
AE
S
a
l
g
o
r
i
t
h
m
.
c.
T
h
e
AE
S
-
g
en
er
ate
d
k
e
y
u
n
d
er
g
o
es
an
a
d
d
itio
n
al
l
ay
er
of
s
ec
u
r
ity
th
r
o
u
g
h
ellip
tic
cu
r
v
e
cr
y
p
to
g
r
ap
h
y
en
cr
y
p
tio
n
.
d.
T
h
e
r
esu
ltan
t
k
ey
is
s
en
t
to
th
e
clien
t,
wh
o
will
u
tili
ze
it
t
o
u
n
s
cr
am
b
le
th
e
AE
S
k
ey
b
l
o
ck
d
u
r
i
n
g
th
e
d
ec
o
d
in
g
s
tag
e.
e.
T
h
e
to
tal
en
cr
y
p
tio
n
d
u
r
atio
n
f
o
r
th
e
d
ata
b
lo
ck
is
co
m
p
u
ted
an
d
a
r
c
h
i
v
e
d
.
f.
Fo
llo
win
g
AE
S
k
ey
d
ec
o
d
in
g
,
t
h
e
en
c
o
d
ed
in
f
o
r
m
atio
n
is
th
en
u
n
r
av
eled
u
tili
zin
g
th
e
AE
S
k
ey
b
lo
ck
,
r
ee
s
tab
lis
h
in
g
it to
its
u
n
iq
u
e
ar
r
an
g
em
e
n
t f
o
r
clien
t a
cc
ess
.
g.
T
h
e
attac
k
er
m
o
d
u
le
co
m
p
u
t
es
r
esp
o
n
s
e
tim
es
o
f
en
cr
y
p
t
ed
o
u
tp
u
ts
f
r
o
m
th
e
s
er
v
e
r
b
y
em
p
lo
y
i
n
g
a
r
an
g
e
o
f
r
an
d
o
m
k
ey
s
alo
n
g
s
id
e
a
v
alid
k
ey
.
h.
T
h
e
attac
k
er
m
o
d
u
le'
s
co
r
r
el
atio
n
p
r
o
g
r
am
an
aly
ze
s
tim
i
n
g
d
etails
f
o
r
b
o
t
h
s
ce
n
ar
io
s
,
g
en
er
atin
g
a
p
o
ten
tial
k
e
y
s
p
ac
e
b
ased
o
n
th
ese
tim
in
g
s
.
T
h
is
k
ey
s
p
ac
e
aid
s
in
d
e
d
u
cin
g
th
e
ac
cu
r
ate
k
e
y
co
m
b
in
atio
n
[
1
6
]
.
3
.
3
.
Sy
s
t
e
m
a
r
c
h
i
t
e
c
t
u
r
e
In
F
ig
u
r
e
2
,
th
e
p
lain
te
x
t
will
b
e
g
iv
en
as
in
p
u
t
to
th
e
cip
h
er
,
an
d
th
e
k
e
y
will
be
cr
ea
t
ed
th
r
o
u
g
h
th
e
p
r
o
p
er
ties
o
f
an
ellip
tic
b
en
d
co
n
d
itio
n
r
at
h
er
th
a
n
th
e
co
n
v
en
tio
n
al
s
tr
ateg
y
f
o
r
ag
e
as
a
r
esu
lt
o
f
h
u
g
e
in
d
iv
is
ib
le
n
u
m
b
e
r
s
,
th
e
p
lain
tex
t w
ill b
e
cip
h
er
ed
[
1
7
]
.
Fig
u
r
e
2
.
Flo
wch
ar
t
o
f
s
y
s
tem
ar
ch
itectu
r
e
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
d
va
n
ce
d
en
cryp
tio
n
s
ta
n
d
a
r
d
w
ith
a
s
ymm
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c
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ch
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fo
r
text
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cryp
tio
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…
(
R
a
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n
d
r
a
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)
1267
4.
R
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n
co
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p
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in
g
th
e
en
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tio
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s
s
ap
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lied
to
a
tex
tu
al
d
o
cu
m
en
t.
T
h
is
en
cr
y
p
tio
n
em
p
l
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4
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1
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P
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[
1
8
]
:
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alg
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m
s
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[
1
9
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.
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9
2
,
a
n
d
th
e
p
r
o
p
o
s
ed
Hy
b
r
i
d
AE
S
-
E
C
C
f
r
a
m
ewo
r
k
,
is
d
is
p
lay
ed
in
T
ab
le
2
.
As d
em
o
n
s
tr
ated
,
th
e
s
tan
d
ar
d
AE
S
-
1
9
2
s
h
o
ws
a
s
lig
h
t
in
cr
ea
s
e
in
en
c
r
y
p
tio
n
tim
e
(
2
0
%
o
v
er
all
in
c
r
ea
s
e
in
en
cr
y
p
tio
n
tim
e)
co
m
p
ar
ed
to
AE
S
-
1
2
8
,
wh
ic
h
is
ex
p
ec
ted
g
i
v
en
th
e
co
m
p
u
tatio
n
al
o
v
er
h
ea
d
o
f
two
m
o
r
e
r
o
u
n
d
s
(
1
2
to
tal
r
o
u
n
d
s
)
o
f
p
r
o
ce
s
s
in
g
tim
e.
T
h
e
Pro
p
o
s
ed
Hy
b
r
id
alg
o
r
ith
m
ac
h
iev
es
s
ig
n
if
ican
tly
g
r
ea
t
er
ef
f
icien
cies
with
b
o
th
s
tan
d
ar
d
AE
S
p
r
o
ce
s
s
e
s
.
T
h
e
ef
f
icac
y
o
f
th
e
Hy
b
r
i
d
d
esig
n
is
d
u
e
to
th
e
ab
ilit
y
to
co
n
s
tr
ain
th
e
co
m
p
u
tatio
n
s
ass
o
ciate
d
with
E
C
C
en
cr
y
p
tio
n
to
ju
s
t
a
s
m
all
k
ey
b
lo
ck
an
d
to
k
ee
p
th
e
m
ain
b
u
lk
d
ata
en
cr
y
p
tio
n
o
p
tim
ally
f
ast th
u
s
m
in
im
izin
g
o
v
er
all
en
cr
y
p
tio
n
tim
e
wh
ile
k
ee
p
in
g
laten
cy
lo
w.
A
g
r
ap
h
ical
r
ep
r
esen
tatio
n
o
f
th
e
en
cr
y
p
tio
n
a
n
d
d
ec
r
y
p
ti
o
n
p
er
f
o
r
m
an
ce
r
elativ
e
to
f
ile
s
ize
i
s
p
r
o
v
id
e
d
in
Fig
u
r
e
3
.
As
o
b
s
er
v
ed
,
th
e
ti
m
e
in
cr
ea
s
es
lin
ea
r
ly
with
d
ata
s
ize,
d
em
o
n
s
tr
ati
n
g
th
e
alg
o
r
ith
m
'
s
s
tab
ilit
y
.
T
o
p
r
o
v
id
e
s
tatis
tic
al
ce
r
tain
ty
,
s
ev
e
r
al
test
s
wer
e
p
er
f
o
r
m
e
d
o
n
th
e
Hy
b
r
id
Sy
s
tem
,
an
d
th
e
n
u
m
b
er
s
lis
ted
r
e
p
r
esen
t
th
e
m
o
d
eled
a
v
er
ag
e
(
s
)
f
o
r
all
s
etu
p
s
[
15
]
.
T
h
e
o
v
er
all
ef
f
ici
en
cy
f
o
u
n
d
in
th
e
Hy
b
r
id
Mo
d
el
is
d
u
e
in
lar
g
e
p
ar
t
to
th
e
in
h
er
en
t
p
ar
alle
l
p
r
o
ce
s
s
in
g
ca
p
ab
ilit
y
o
f
AE
S
an
d
m
o
d
er
n
-
d
ay
C
PU
s
u
s
in
g
th
e
AE
S
New
I
n
s
tr
u
ctio
n
s
(
AE
S
-
NI
)
p
r
o
v
id
e
a
n
ev
en
g
r
ea
ter
lev
el
o
f
s
p
ee
d
an
d
p
er
f
o
r
m
a
n
ce
to
p
r
o
ce
s
s
all
th
e
o
p
e
r
atio
n
s
in
v
o
lv
ed
with
im
p
lem
e
n
tin
g
t
h
e
Hy
b
r
id
Me
th
o
d
[
2
0
]
,
[2
1
]
,
e
n
ab
lin
g
p
r
o
c
ess
o
r
s
with
AE
S
-
NI
Har
d
war
e
Su
p
p
o
r
t
to
ac
h
iev
e
s
ig
n
if
ica
n
t
p
er
f
o
r
m
an
ce
lea
p
s
o
v
er
s
o
f
twar
e
im
p
lem
en
tatio
n
s
,
wh
eth
er
it b
e
ac
ce
ler
ated
o
r
u
n
ac
ce
ler
ated
[
2
2
].
T
ab
le
1
.
Sp
ee
d
o
f
th
e
p
r
o
p
o
s
ed
alg
o
r
ith
m
Te
x
t
s
i
z
e
(
M
B
)
Ti
me
i
n
s
e
c
o
n
d
s
P
r
o
p
o
se
d
a
l
g
o
r
i
t
h
m
A
ES(
1
2
8
b
i
t
k
e
y
)
A
ES+B
l
o
w
f
i
s
h
(
1
2
8
b
i
t
k
e
y
)
D
e
c
r
y
p
t
i
o
n
En
c
r
y
p
t
i
o
n
D
e
c
r
y
p
t
i
o
n
En
c
r
y
p
t
i
o
n
D
e
c
r
y
p
t
i
o
n
En
c
r
y
p
t
i
o
n
10
0
.
0
0
0
2
0
.
0
0
0
2
0
.
0
0
0
1
7
4
0
.
0
0
1
6
4
2
0
.
0
0
0
4
6
0
0
.
0
0
1
8
5
0
25
0
.
0
0
0
5
0
.
0
0
0
4
5
0
.
0
0
0
3
0
9
0
.
0
0
1
8
5
0
0
.
0
0
0
8
8
7
0
.
0
0
2
0
3
0
50
0
.
0
0
0
9
0
.
0
0
0
8
5
0
.
0
0
0
4
4
3
0
.
0
0
2
0
4
5
0
.
0
0
1
0
5
0
0
.
0
0
2
3
5
0
75
0
.
0
0
1
4
0
.
0
0
1
3
5
0
.
0
0
0
6
5
2
0
.
0
0
2
2
5
6
0
.
0
0
1
5
5
4
0
.
0
0
2
5
6
7
1
0
0
0
.
0
0
1
8
5
0
.
0
0
1
7
0
.
0
0
0
8
5
1
0
.
0
0
2
5
6
3
0
.
0
0
1
9
7
8
0
.
0
0
2
8
1
4
T
ab
le 2
.
E
n
cr
y
p
ti
o
n
tim
e
co
m
p
a
r
is
o
n
an
aly
s
is
(
AE
S
-
1
2
8
v
s
.
AE
S
-
1
9
2
v
s
.
Hy
b
r
id
)
D
a
t
a
si
z
e
(
M
B
)
S
t
a
n
d
a
r
d
A
ES
-
1
2
8
(
s)
S
t
a
n
d
a
r
d
A
ES
-
1
9
2
(
s)
P
r
o
p
o
se
d
h
y
b
r
i
d
A
ES
-
EC
C
(
s)
1
0
M
B
0
.
0
0
1
6
4
2
0
.
0
0
1
9
7
0
0
.
0
0
0
2
0
0
2
5
M
B
0
.
0
0
1
8
5
0
0
.
0
0
2
2
2
0
0
.
0
0
0
4
5
0
5
0
M
B
0
.
0
0
2
0
4
5
0
.
0
0
2
4
5
4
0
.
0
0
0
8
5
0
7
5
M
B
0
.
0
0
2
2
5
6
0
.
0
0
2
7
0
7
0
.
0
0
1
3
5
0
1
0
0
M
B
0
.
0
0
2
5
6
3
0
.
0
0
3
0
7
6
0
.
0
0
1
7
0
0
4
.
3
.
Securit
y
a
na
ly
s
is
A
b
lo
ck
cip
h
e
r
is
s
aid
t
o
e
x
h
ib
it
an
'
Av
alan
ch
e
E
f
f
ec
t'
wh
en
th
e
d
if
f
e
r
en
ce
(
th
e
'
Ham
m
in
g
Dis
tan
ce
'
)
b
etwe
en
two
ci
p
h
er
tex
ts
g
en
e
r
ated
f
r
o
m
m
ess
ag
es
d
if
f
er
in
g
b
y
a
s
m
all
am
o
u
n
t
(
e.
g
.
,
o
n
e
b
it)
is
as
lar
g
e
as
p
o
s
s
ib
le.
I
d
ea
lly
,
if
'
K'
is
th
e
s
in
g
le
-
d
ig
it
ch
a
n
g
e,
K
s
h
o
u
ld
c
h
an
g
e
a
p
p
r
o
x
.
5
0
% o
f
th
e
cip
h
er
tex
t d
ig
its
.
4
.
3
.
1
.
Av
a
la
nche
e
f
f
ec
t
a
na
ly
s
is
W
e
h
av
e
ev
alu
ated
t
h
e
1
6
-
r
o
u
n
d
AE
S
alg
o
r
ith
m
as
p
r
o
p
o
s
e
d
,
an
d
in
ea
ch
o
f
f
iv
e
test
s
ca
r
r
ied
o
u
t,
a
s
in
g
le
b
it
(
o
n
e
b
it)
was
in
v
e
r
ted
in
th
e
p
lain
tex
t.
W
e
th
en
r
ec
o
r
d
ed
h
o
w
m
a
n
y
b
its
in
th
e
r
esu
ltin
g
cip
h
er
te
x
t
wer
e
d
if
f
er
e
n
t
f
r
o
m
th
e
o
r
ig
i
n
al
cip
h
er
tex
t
a
n
d
ca
lc
u
lated
th
e
Ham
m
in
g
d
is
tan
ce
(
th
e
n
u
m
b
er
o
f
b
its
th
at
d
if
f
er
ed
)
b
etwe
en
th
e
two
.
T
h
e
r
esu
lts
o
f
th
is
s
tu
d
y
ar
e
d
etailed
in
T
ab
le
3
.
T
h
e
r
esu
lts
p
r
esen
ted
in
T
ab
le
3
in
d
icate
th
at
th
e
p
r
o
p
o
s
ed
AE
S
alg
o
r
ith
m
h
ad
an
a
v
er
ag
e
av
alan
ch
e
ef
f
ec
t
o
f
4
9
.
8
4
%,
wh
ich
is
r
em
ar
k
ab
ly
clo
s
e
to
th
e
id
ea
l
o
f
5
0
%.
T
h
ese
f
in
d
in
g
s
s
u
p
p
o
r
t
o
u
r
h
y
p
o
th
esis
th
at
th
e
ad
d
itio
n
o
f
m
o
r
e
r
o
u
n
d
s
will
d
is
tr
ib
u
te
d
if
f
er
en
ce
s
th
r
o
u
g
h
o
u
t
th
e
e
n
tire
cip
h
er
tex
t,
cr
ea
tin
g
an
u
n
p
r
e
d
ictab
le
cr
y
p
to
g
r
a
p
h
ic
f
u
n
ctio
n
th
at
will b
e
r
esis
tan
t to
s
tatis
tical
attac
k
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
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ec
h
n
o
l
I
SS
N:
2252
-
8
7
7
6
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d
va
n
ce
d
en
cryp
tio
n
s
ta
n
d
a
r
d
w
ith
a
s
ymm
etri
c
ke
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ex
ch
a
n
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e
fo
r
text
en
cryp
tio
n
…
(
R
a
vi
n
d
r
a
K
R
ed
d
y
)
1269
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u
r
e
3
.
I
ll
u
s
tr
ates to
en
cr
y
p
t
1
MB o
f
d
ata
th
e
alg
o
r
ith
m
ta
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es 1
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s
,
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s
am
e
1
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f
d
ata
n
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ed
s
1
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9
m
s
to
d
ec
r
y
p
t
T
ab
le
3
.
Av
alan
c
h
e
ef
f
ec
t
test
r
esu
lts
Te
st
c
a
s
e
To
t
a
l
b
i
t
s
B
i
t
f
l
i
p
p
e
d
p
o
si
t
i
o
n
B
i
t
s c
h
a
n
g
e
d
(
h
a
mm
i
n
g
d
i
st
a
n
c
e
)
A
v
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l
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n
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e
e
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f
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t
(
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e
0
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B
i
t
3
63
4
9
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2
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1
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t
1
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1
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e
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t
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e
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t
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5
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7
8
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e
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a
g
e
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3
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4
9
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8
4
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4
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3
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2
.
No
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s
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ess
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ent
At
th
e
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am
e
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e,
h
ig
h
n
o
n
lin
ea
r
ity
,
as
m
ea
s
u
r
ed
b
y
Ham
m
in
g
d
is
tan
ce
,
in
d
icate
s
th
at
th
er
e
is
n
o
lin
ea
r
r
elatio
n
s
h
ip
b
etwe
en
o
u
tp
u
t
an
d
i
n
p
u
t,
a
n
d
th
er
e
f
o
r
e
an
alg
o
r
ith
m
t
h
at
p
r
o
d
u
ce
s
a
h
ig
h
ly
n
o
n
lin
ea
r
cip
h
er
tex
t
will
r
esis
t
attac
k
s
u
s
in
g
lin
ea
r
c
r
y
p
ta
n
al
y
s
is
.
T
h
e
p
r
o
p
o
s
ed
al
g
o
r
ith
m
u
s
es
th
e
s
tan
d
ar
d
AE
S
s
u
b
s
titu
tio
n
b
o
x
(
S
-
B
o
x
)
f
o
r
i
ts
n
o
n
-
lin
ea
r
ity
tr
an
s
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1
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[
2
3
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.
5.
C
O
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CL
US
I
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N
T
h
is
s
tu
d
y
cr
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ted
an
d
im
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with
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h
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in
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s
id
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ch
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n
el
attac
k
s
o
n
th
e
in
f
o
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m
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n
.
T
h
is
ex
p
er
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en
t
al
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s
is
s
h
o
wed
th
at
th
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h
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o
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ly
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ig
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d
d
if
f
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is
tech
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h
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m
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m
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d
with
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ic
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h
at
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ty
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ib
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tim
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m
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s
t b
e
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o
ted
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at
it wa
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cte
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s
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s
im
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latio
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a
s
o
f
twar
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en
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ir
o
n
m
en
t.
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e
s
p
ec
if
ic
lim
itatio
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th
at
n
o
p
h
y
s
ical
m
ea
s
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r
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en
ts
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at
th
e
h
ar
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e
lev
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to
m
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s
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m
p
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cr
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p
tio
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Fu
tu
r
e
wo
r
k
will
co
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tr
ate
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n
co
n
d
u
ctin
g
h
a
r
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to
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ain
s
t
p
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aly
s
is
s
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ch
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n
el
attac
k
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as
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ad
ap
tin
g
t
h
e
cu
r
r
en
t
p
r
o
t
o
co
l
f
o
r
im
p
lem
en
tatio
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with
in
wir
eless
b
o
d
y
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etwo
r
k
s
(
W
B
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,
th
er
ef
o
r
e
d
eter
m
in
in
g
its
ef
f
ec
tiv
e
n
ess
o
n
lo
w
-
p
o
wer
I
o
T
d
ev
ice
ty
p
es.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
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N
:
2
2
5
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F
UNDING
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NF
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h
is
wo
r
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d
id
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p
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g
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f
r
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m
f
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d
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g
ag
en
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in
th
e
p
u
b
lic,
co
m
m
er
cial,
o
r
non
-
p
r
o
f
it secto
r
s
.
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
t
r
ib
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to
r
R
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les
T
a
x
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o
m
y
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to
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g
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ize
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iv
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d
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al
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th
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tio
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ce
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h
ip
d
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p
u
tes,
an
d
f
ac
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ate
co
llab
o
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atio
n
.
Na
m
e
o
f
Aut
ho
r
C
M
So
Va
Fo
I
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Vi
Su
P
Fu
R
av
in
d
r
a
K
R
ed
d
y
✓
✓
✓
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✓
✓
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✓
✓
✓
Vijay
alak
s
h
m
i P
✓
✓
✓
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✓
C
:
C
o
n
c
e
p
t
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a
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z
a
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:
M
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So
f
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Va
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ter
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CAL AP
P
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T
h
is
s
tu
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d
id
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u
m
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im
al
s
u
b
jects.
DATA AV
AI
L
AB
I
L
I
T
Y
All
d
ata
g
en
er
ated
o
r
an
aly
ze
d
d
u
r
in
g
th
is
s
tu
d
y
ar
e
in
clu
d
e
d
with
in
t
h
e
ar
ticle.
Ad
d
itio
n
a
l
m
ater
ials
o
r
clar
if
icatio
n
s
ca
n
b
e
p
r
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v
id
ed
b
y
t
h
e
au
th
o
r
s
u
p
o
n
r
ea
s
o
n
ab
le
r
eq
u
est.
RE
F
E
R
E
NC
E
S
[
1
]
W
.
S
t
a
l
l
i
n
g
s
,
C
ry
p
t
o
g
ra
p
h
y
a
n
d
N
e
t
w
o
rk
S
e
c
u
ri
t
y
:
Pr
i
n
c
i
p
l
e
s
a
n
d
Pr
a
c
t
i
c
e
,
7
t
h
e
d
.
,
P
e
a
r
s
o
n
I
n
d
i
a
,
2
0
1
8
.
[
2
]
R
.
P
a
h
a
l
a
n
d
V
.
K
u
mar,
“
Ef
f
i
c
i
e
n
t
i
mp
l
e
me
n
t
a
t
i
o
n
o
f
A
ES,”
I
n
t
e
r
n
a
t
i
o
n
a
l
J
o
u
r
n
a
l
o
f
Ad
v
a
n
c
e
d
Re
se
a
r
c
h
i
n
C
o
m
p
u
t
e
r
S
c
i
e
n
c
e
a
n
d
S
o
f
t
w
a
re
E
n
g
i
n
e
e
r
i
n
g
,
v
o
l
.
3
,
n
o
.
7
,
p
p
.
2
9
0
–
2
9
5
,
Ju
l
y
2
0
1
3
.
[
3
]
H
.
Ta
n
g
e
a
n
d
B
.
A
n
d
e
r
se
n
,
“
A
t
t
a
c
k
s
a
n
d
c
o
u
n
t
e
r
mea
s
u
r
e
s
o
n
A
ES
a
n
d
EC
C
,
”
i
n
Pr
o
c
.
I
E
EE
I
n
t
.
S
y
m
p
.
Wi
re
l
e
ss
Pe
rs
o
n
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l
Mu
l
t
i
m
e
d
i
a
C
o
m
m
u
n
i
c
a
t
i
o
n
s (
WP
M
C
)
,
p
p
.
1
–
5
,
J
u
n
.
2
0
1
3
.
[
4
]
D
.
Jay
a
si
n
g
h
e
,
J.
F
e
r
n
a
n
d
o
,
R
.
H
e
r
a
t
h
,
a
n
d
R
.
R
a
g
e
l
,
“
R
e
m
o
t
e
c
a
c
h
e
t
i
m
i
n
g
a
t
t
a
c
k
o
n
a
d
v
a
n
c
e
d
e
n
c
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y
p
t
i
o
n
s
t
a
n
d
a
r
d
a
n
d
co
u
n
t
e
r
m
e
a
s
u
r
e
,
”
i
n
Pr
o
c
.
I
EE
E
I
n
t
.
C
o
n
f
.
I
n
f
o
rm
a
t
i
o
n
a
n
d
A
u
t
o
m
a
t
i
o
n
f
o
r
S
u
s
t
a
i
n
a
b
i
l
i
t
y
(
I
C
I
AFs)
,
p
p
.
1
7
7
–
1
8
2
,
D
e
c
.
2
0
1
0
,
d
o
i
:
1
0
.
1
1
0
9
/
I
C
I
A
F
S
.
2
0
1
0
.
5
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