Inter
national
J
our
nal
of
Inf
ormatics
and
Communication
T
echnology
(IJ-ICT)
V
ol.
15,
No.
4,
December
2026,
pp.
1726
∼
1735
ISSN:
2252-8776,
DOI:
10.11591/ijict.v15i4.pp1726-1735
❒
1726
An
explainable
AI-based
intrusion
detection
system
f
or
cyber
thr
eats
in
stock
mark
ets
using
the
SECURE
framew
ork
Anandhi
Ramani
1
,
Malath
y
S.
1
,
Ramya
K.
2
1
PG
and
Research
Department
of
Computer
Science,
Dw
araka
Doss
Go
v
erdhan
Doss
V
aishna
v
Colle
ge,
Chennai,
India
2
PG
Department
of
Information
T
echnology
and
BCA,
Dw
araka
Doss
Go
v
erdhan
Doss
V
aishna
v
Colle
ge,
Chennai,
India
Article
Inf
o
Article
history:
Recei
v
ed
Feb
2,
2026
Re
vised
Sep
6,
2026
Accepted
Sep
18,
2026
K
eyw
ords:
Articial
intelligence
Cybersecurity
Explainable
AI
Intrusion
detection
system
Mark
et
manipulation
ABSTRA
CT
As
electronic
trading
technology
accelerates
the
w
ay
trades
occur
in
nancial
mark
ets,
the
ability
to
manipulate
the
mark
ets
in
man
y
dif
ferent
w
ays
has
be-
come
stronger
through
this
same
technology
.
T
w
o
w
ays
this
happens
are
via
spoong
and
layering,
which
perv
ert
the
w
ay
prices
are
determined,
confuse
in-
v
estors,
and
reduce
the
le
v
el
of
trust
in
the
inte
grity
of
nancial
mark
ets.
Exist-
ing
surv
eillance
mechanisms
were
predominantly
rule-bas
ed
or
relied
on
opaque
machine
learning
models,
limi
ting
their
adaptability
and
interpretability
.
This
study
proposed
SECURE,
an
e
xplainable
articial
intelligenc
e
(AI)-based
in-
trusion
detection
system
designed
to
detect
and
interpret
spoong
and
layering
acti
vities
in
real
time.
The
frame
w
ork
inte
grated
ensemble
machine
learning
models,
c
ybersecurity-inspired
monitoring
logic,
and
shaple
y
additi
v
e
e
xpla-
nations
(SHAP)-based
e
xplainability
to
achie
v
e
accurate
detection
with
trans-
parent
decision-making.
Using
Le
v
el-II
order
book
data,
the
system
analysed
beha
vioural
and
microstructural
trading
features
to
classify
manipulati
v
e
pat-
terns
while
generating
feature-le
v
el
e
xplanations
for
each
alert.
Experimental
e
v
aluation
demonstrated
that
the
propose
d
frame
w
ork
achie
v
ed
high
detection
accurac
y
,
lo
w
f
alse-positi
v
e
rat
es,
and
dependable
real-time
performance.
The
results
indicated
that
combining
intrusion
detection
principles
with
e
xplainable
AI
impro
v
ed
re
gulatory
interpretability
and
strengthened
the
ef
fecti
v
eness
of
au-
tomated
mark
et
surv
eillance
systems.
This
is
an
open
access
article
under
the
CC
BY
-SA
license
.
Corresponding
A
uthor:
Anandhi
Ramani
PG
and
Research
Department
of
Computer
Science,
Dw
araka
Doss
Go
v
erdhan
Doss
V
aishna
v
Colle
ge
Chennai,
T
amil
Nadu,
India
Email:
sekadhi@gmail.com
1.
INTR
ODUCTION
In
the
li
st
of
these
c
ybersecurity
threats,
some
methods
of
mark
et
manipulation
lik
e
spoong
and
layering
pose
a
signicant
threat
to
mark
et
inte
grity
and
in
v
estor
condence
[1].
In
case
of
spoong,
lar
ge
b
uy
and
sell
orders
are
placed
b
ut
there
is
no
intention
behind
them
for
actual
e
x
ecution
of
trade
while
in
case
of
layering,
percei
v
ed
[2]
depth
of
the
mark
et
is
manipulated
through
placing
v
arious
orders
at
v
arying
price
le
v
els
[3].
Such
manipulati
v
e
techniques
distort
the
process
of
price
disco
v
ery
and
create
articial
liquidity
within
the
nancial
mark
ets.
Retail
in
v
estors
can
be
easily
manipulated
through
these
strate
gies
since
the
y
mainly
use
publicly
a
v
ailable
order
book
data
for
their
trades
[4].
J
ournal
homepage:
http://ijict.iaescor
e
.com
Evaluation Warning : The document was created with Spire.PDF for Python.
Int
J
Inf
&
Commun
T
echnol
ISSN:
2252-8776
❒
1727
Ho
we
v
er
,
the
current
mark
et
surv
eillance
technologies
hea
vily
use
rule-based
and
threshold-based
ap-
proaches
for
recognizing
suspicious
beha
viors
in
the
mark
et
[5].
While
such
an
approach
is
quite
successful
when
detecting
specic
violati
ons,
it
f
ails
to
e
v
olv
e
in
response
to
the
ne
w
and
increasingly
comple
x
manipula-
tions
in
the
nancial
mark
et.
Additionally
,
using
strict
rule-based
criteria
often
leads
to
a
lar
ge
amount
of
f
alse
positi
v
es,
causing
an
increased
w
orkload
for
the
re
gulators
and,
thus,
decreasing
the
ef
cienc
y
of
automatic
mark
et
surv
eillance
technologies.
Therefore,
it
w
as
decided
to
use
articial
intelligence
(AI)
and
machine
learning
algorithms
to
perform
mark
et
surv
eillance.
F
or
dealing
with
the
interpretability
issues
associated
with
traditional
AI
algorithms,
the
methods
of
e
xplainable
articial
intelligence
(XAI)
ha
v
e
recei
v
ed
considerable
interes
t
in
the
domain
of
nancial
surv
eil-
lance
[6].
One
such
method
is
SHAP
,
which
e
xplains
the
contrib
ution
of
indi
vidual
features
to
w
ards
the
model
prediction
[7].
Despite
the
adv
antages
of
XAI
for
making
the
model
more
interpretable,
pre
vious
research
does
not
consider
t
h
e
implementation
of
e
xplainability
along
with
real-time
surv
eillance
and
c
yber
security
based
intrusion
detection
system
[8].
Dri
v
en
by
suc
h
research
issues,
this
paper
a
ims
to
introduce
SECURE,
an
intrusion
detection
frame-
w
ork
based
on
c
ybersecurity
concepts
for
spoong
and
layering
in
stock
mark
ets.
Xu
and
Lin
[9]
This
frame-
w
ork
ut
ilizes
machine
learning,
structured
v
alidation
with
rul
es,
and
XAI
for
real-time
and
accurate
detection
and
monitoring
in
stock
mark
ets
[10].
By
applying
beha
vioral
analysis
together
with
e
xplainable
decision
sup-
port
tools,
SECURE
intends
to
impro
v
e
transparenc
y
in
the
mark
et,
increase
re
gulatory
control,
and
of
fer
better
protection
for
in
v
estors.
The
ne
xt
section
describes
past
research
studies
and
their
limitations
[11].
T
able
1
presents
a
comparati
v
e
summary
of
representati
v
e
studies
in
mark
et
manipulation
dete
ction.
T
able
1
sho
ws
that
signicant
achie
v
ements
ha
v
e
been
reached
in
terms
of
detection
of
mark
et
manipulations
using
rule-based
surv
eillance,
machine
learning
approaches,
c
ybersecurity-based
intrusion
detection
system
techniques,
and
e
xplainable
AI
methods.
Although
man
y
adv
ancements
ha
v
e
been
made
in
this
eld,
there
is
still
a
lack
of
research
in
terms
of
creating
a
holistic
surv
eillance
frame
w
ork
instead
of
just
focusing
on
enhancing
certain
components
of
the
detection
frame
w
ork.
The
machine
learning
approach
usually
performs
well
in
terms
of
detection
b
ut
lacks
interpretability
while
the
e
xplanation-based
methods
hardly
e
v
er
pro
vide
real-time
operation
capability
.
On
the
other
hand,
c
ybersecurity-based
intrusion
detecti
on
methods
ha
v
e
not
been
used
much
for
beha
vioural
analysis
of
Le
v
el-II
order
books
data.
T
able
1.
Comparison
of
e
xisting
studies
on
mark
et
manipulation
detection
Citations
F
ocus
K
e
y
strength
K
e
y
limitation
[12],
[13]
Mark
et
v
olatility
,
trading
acti
vity
during
c
yber
-attacks
Sho
ws
ho
w
c
yber
threats
impact
nancial
mark
ets
Does
not
detect
manipulation
patterns
[14],
[15]
Order
book
depth,
spoong
patterns,
f
ak
e
liquidity
Strong
theoretical
basis
for
spoong
and
layering
Not
real-time
operational
[16],
[17]
Cancellation
b
ursts,
order
lifetime,
frequenc
y
patterns
Detects
high-frequenc
y
spoong
strate
gies
Limited
interpretability
[18],
[19]
Layering
depth,
order
placement
imbalance
Strong
re
gulatory
rele
v
ance
for
manipulation
cases
High
computational
o
v
erhead
[20],
[21]
Distrib
ution
shifts
in
order
-o
w
No
v
el
quantitati
v
e
method
for
spoong
detection
Comple
x
to
tune,
not
industry-ready
[22],
[23]
HFT
order
inno
v
ations,
manipulation
beha
viours
Clear
distinction
between
le
gitimate
HFT
and
ab
use
No
ML
or
XAI
inte
gration
[24],
[25]
System
vulnerabilities,
attack
v
ectors
in
nance
Strong
justication
for
IDS
inclusion
No
trading-pattern
detection
[26],
[27]
Sector
-le
v
el
c
ybersecurity
challenges
Supports
c
ybersecurity-moti
v
ated
mark
et
surv
eillance
Not
focused
on
trading
microstructure
[28],
[29]
High-frequenc
y
trade
sequences
Strong
ML
foundation
for
real-time
fraud
detection
Black-box,
lacks
e
xplainability
[30],
[31]
Price-v
olume
anomalies,
manipulation
signals
Modern
ML
approach
for
manipulation
detection
Does
not
handle
spoong
patterns
e
xplicitly
Se
v
eral
research
limitations
are
identied
from
the
e
xisting
literature
re
vie
w
concerning
the
problem
of
stock
mark
et
manipulation
detection.
The
rst
one
is
that
the
traditional
rule-based
systems
ha
v
e
transpar
-
ent
decision
process
b
ut
lack
e
xibility
in
adapting
to
changing
spoong
and
layering
techniques
in
dynamic
mark
ets
[21],
[22].
Secondly
,
despite
the
f
act
that
machine
learning
and
deep
learning
models
ha
v
e
consider
-
ably
enhanced
detection
accurac
y
,
the
majority
of
these
models
remain
black-box
systems
and
thus
can
hardly
An
e
xplainable
AI-based
intrusion
detection
system
for
cyber
thr
eats
in
stoc
k
mark
ets
...
(Anandhi
Ramani)
Evaluation Warning : The document was created with Spire.PDF for Python.
1728
❒
ISSN:
2252-8776
be
used
for
conducting
in
v
estig
ation
and
audi
ting.
Thirdly
,
current
XAI
research
is
predominantly
aimed
at
pro
viding
e
xplanation
after
making
the
predictions
and
it
is
seldom
incorporated
in
the
mark
et
surv
eillance
process.
Lastly
,
while
IDS
ha
v
e
been
pro
v
ed
to
be
successful
in
c
ybersecurity
applications,
their
application
for
analysing
the
beha
viour
of
Le
v
el-II
order
book
and
traders
has
been
barely
e
xplored.
2.
THE
PR
OPOSED
SECURE
FRAMEW
ORK
2.1.
Ov
er
view
of
the
pr
oposed
SECURE
framew
ork
In
this
paper
,
we
introduce
the
SECURE
frame
w
ork
which
is
a
c
ybersecurity-inspired
and
an
e
xplain-
able
approach
to
detect
spoong
and
layering
manipulations
in
the
stock
mark
et
as
sho
wn
in
Figure
1.
Jacob-
Leal
and
Hanaki
[23]
in
contrast
to
traditional
approaches
for
mark
et
surv
eillance,
which
use
either
rule-based
monitoring
only
or
machine
learning
alone,
SECURE
utilizes
ensemble
machine
learning
techniques
along
with
beha
vioral
rule
v
alidation
and
state-based
intrusion
detection,
all
under
one
detection
frame
w
ork,
together
with
XAI
techniques.
SECURE
architecture
is
made
up
of
six
interacting
layers,
namely
the
surv
eillance
layer
,
the
e
xamination
layer
,
the
control
layer
,
the
understanding
layer
,
the
response
layer
,
and
the
enhancement
layer
.
Figure
1.
Layers
of
the
SECURE
Frame
w
ork
2.2.
Operational
w
orko
w
of
the
SECURE
framew
ork
The
proposed
SECURE
frame
w
ork
follo
wed
a
structured
six-stage
operational
pipeline,
as
ill
u
s
trated
in
Figure
2:
Surv
eillance:
real-time
ingestion
of
Le
v
el-II
order
book
e
v
ents;
Examination:
feature
computation
and
preliminary
anomaly
scoring;
Control:
rule-based
enforcement
using
predened
beha
vioural
thresholds;
Understanding:
generation
of
SHAP-based
e
xplanations;
Response:
dispatch
of
structured
and
e
xplainable
alerts;
Enhancement:
continuous
learning
through
v
alidated
analyst
feedback.
Figure
2.
Operational
w
orko
w
of
the
SECURE
frame
w
ork
Int
J
Inf
&
Commun
T
echnol,
V
ol.
15,
No.
4,
December
2026:
1726-1735
Evaluation Warning : The document was created with Spire.PDF for Python.
Int
J
Inf
&
Commun
T
echnol
ISSN:
2252-8776
❒
1729
2.3.
Explainability
mechanism
XAI
w
as
implemented
using
SHAP
to
generate
feature-le
v
el
attrib
utions
[29].
The
follo
wing
is
ho
w
the
e
xplanation
function
w
orks:
f
(
x
t
)
=
ϕ
0
+
n
X
i
=1
ϕ
i
(1)
where
ϕ
i
represents
the
contrib
ution
of
the
i
-th
feature
to
the
nal
model
prediction.
This
formulation
enabled
transparent
interpretation
of
ho
w
indi
vidual
features
inuenced
the
model
output.
2.4.
Pr
oposed
detection
models
Three
progressi
v
ely
adv
anced
model
architectures
were
implemented.
2.4.1.
Model
1:
Random
f
or
est
with
SHAP
(Baseline)
This
baseline
model
applies
supervised
learning
combined
with
post-hoc
e
xplainability
[30].
b
y
t
=
f
R
F
(
x
t
)
(2)
2.4.2.
Model
2:
SECURE
+
Random
f
or
est
+
SHAP
This
model
inte
grates
rule-based
e
v
aluation
with
anomaly
scoring
[31].
The
operational
process
is
described
as
follo
ws:
R
t
=
g
(
x
t
)
(3)
A
t
=
|
x
t
−
µ
|
σ
(4)
S
t
=
α
f
RF
(
x
t
)
+
β
A
t
+
γ
R
t
(5)
S
t
≥
τ
⇒
Sus
picious
(6)
2.4.3.
Model
3:
SECURE
+
Random
f
or
est
+
SHAP
+
IDS
The
nal
model,
algorithm
1
represents
the
inte
gration
of
a
state-a
w
are
intrusion
detection
system
for
session-le
v
el
beha
vioural
cor
-relation
[32].
Algorithm
1
IDS-Inte
grated
SECURE
Detection
Requir
e:
Real-time
stream
S
,
IDS
engine,
RF
model
Ensur
e:
Alerts
and
audit
logs
1:
Initialise
IDS
session
memory
2:
f
or
each
e
v
ent
x
t
do
3:
Update
session
state
4:
Extract
features
5:
Compute
R
t
and
A
t
6:
Predict
RF
condence
7:
Compute
IDS
correlation
score
8:
Compute
Risk
t
9:
if
Risk
t
e
xceeds
thresholds
then
10:
Generate
SHAP
e
xplanation
11:
Create
alert
and
store
logs
12:
end
if
13:
end
f
or
14:
Periodically
retrain
using
v
alidated
feedback
C
t
=
IDS
(
x
t
,
H
t
)
(7)
Risk
t
=
w
1
P
t
+
w
2
A
t
+
w
3
C
t
+
w
4
R
t
(8)
Risk
t
≥
τ
high
⇒
Critical
Alert
(9)
Risk
t
≥
τ
med
⇒
W
arning
Alert
(10)
An
e
xplainable
AI-based
intrusion
detection
system
for
cyber
thr
eats
in
stoc
k
mark
ets
...
(Anandhi
Ramani)
Evaluation Warning : The document was created with Spire.PDF for Python.
1730
❒
ISSN:
2252-8776
3.
METHOD
3.1.
Dataset
description
A
Le
v
el-II
stock
mark
et
order
book
dataset
w
as
emplo
yed
in
this
study
.
Each
transaction
record
contained
a
timestamp,
trading
symbol,
order
price,
quantity
,
order
type,
e
x
ecution
status,
order
book
depth
le
v
el,
a
unique
order
identier
,
v
olume
at
the
price
le
v
el,
and
a
deri
v
ed
risk
score.
The
e
xperimental
data
set
contains
Le
v
el-II
stock
mark
et
order
book
data
with
around
800,000
trading
instances
collected
through
elec-
tronic
trading.
In
this
data
set,
le
gitimate
trading
instances
are
mix
ed
with
labelled
instances
of
manipulation,
which
include
spoong
and
layering
actions.
All
transacti
on
s
in
the
data
set
ha
v
e
been
characterized
by
mark
et
microstructure
properties,
beha
vioural
measures,
and
risk
properties.
The
dataset
comprised
both
le
gitimate
trading
instances
and
labelled
e
v
ents
reecting
spoong
and
layering
beha
viours
[24].
Malicious
labels
were
assigned
based
on
e
xpert-dened
beha
vioural
rules
deri
v
ed
from
prior
literature
to
ensure
consistenc
y
with
realistic
mark
et
dynamics.
3.2.
Dataset
a
v
ailability
and
r
epr
oducibility
Due
to
re
gulatory
,
le
g
al,
and
condentiality
constraints
associated
with
Le
v
el-II
stock
mark
et
data,
the
ra
w
order
book
dataset
used
in
this
study
cannot
be
publicly
released.
T
o
address
reproducibility
concerns,
the
e
xperimental
dataset
emplo
yed
in
this
study
consists
of
a
combination
of
anon
ymised
real
trading
records
and
synthetically
generated
manipulation
samples.
The
synthetic
spoong
and
layering
e
v
ents
were
generated
using
e
xpert-dened
beha
vioural
rules
deri
v
ed
from
established
nancial
microstructure
literature,
ensuring
that
realistic
mark
et
dynamics
and
temporal
characteristics
were
preserv
ed.
All
preprocessing
steps,
feature
engineering
procedures,
model
architectures,
and
e
v
aluation
protocols
are
fully
described
within
this
paper
to
enable
methodological
reproducibility
.
Furthermore,
the
proposed
SECURE
frame
w
ork
is
model-agnostic
and
can
be
applied
to
an
y
Le
v
el-II
order
book
dataset
with
equi
v
alent
feature
structure.
3.3.
Data
pr
epr
ocessing
Ra
w
trading
data
were
processed
to
ensure
consistenc
y
,
reliability
and
suitability
for
model
de
v
el-
opment
[25].
The
follo
wing
preprocessing
steps
were
applied:
remo
v
al
of
duplicate
and
logically
inconsistent
records,
missing
v
alue
imputation
using
statistical
substitution,
Min–Max
normalisation
of
numerical
attrib
utes,
label
encoding
of
cate
gorical
v
ariables,
and
temporal
ordering
of
transactions
to
preserv
e
sequence
inte
grity
.
F
ormally
,
each
ra
w
record
x
t
w
as
transformed
using
a
preprocessing
function
as
follo
ws:
x
∗
t
=
P
(
x
t
)
(11)
where
x
∗
t
represents
the
cleaned
and
normalised
data
instance.
3.4.
F
eatur
e
engineering
After
preprocessing,
structured
features
were
deri
v
ed
to
capture
microstructural
and
beha
vioural
char
-
acteristics
associated
with
spoong
and
layering
[26].
Feature
e
xtraction
w
as
performed
o
v
er
both
short-term
and
session-based
time
windo
ws
[27].
The
feature
v
ector
w
as
dened
as
follo
ws:
x
t
=
[
q
t
,
p
t
,
l
t
,
c
t
,
b
t
,
v
t
,
f
t
,
r
t
,
∆
p
t
]
(12)
where
q
t
denotes
the
order
size,
p
t
represents
the
price
relati
v
e
to
the
mid-price,
l
t
corresponds
to
the
order
lifetime,
c
t
indicates
the
cancellation
rate,
b
t
denotes
the
order
book
imbalance,
v
t
represents
the
traded
v
olume
at
the
price
le
v
el,
f
t
indicates
the
trader
submission
frequenc
y
,
r
t
represents
the
risk
score,
and
∆
p
t
denotes
the
short-term
price
mo
v
ement.
3.5.
Machine
lear
ning
detection
engine
This
detection
engine
uses
ensemble
tree
classier
techniques
such
as
Random
F
orest
and
Gradient
Boosted
T
rees
due
to
their
resilience
to
high
dimensional
structured
nancial
data,
as
well
as
SHAP
based
e
xplainability
capability
.
This
technique
w
as
trained
by
the
feature
v
ector
creat
ed
from
Le
v
el-II
order
book
data
for
classication
of
trading
beha
vior
into
eithe
r
le
gitimate,
spoong,
or
layering
beha
vior
[28].
The
predicti
v
e
function
is
formalised
as:
b
y
t
=
f
RF
(
x
t
)
(13)
where
b
y
t
∈
{
le
gitimate
,
spoong
,
layering
}
.
Int
J
Inf
&
Commun
T
echnol,
V
ol.
15,
No.
4,
December
2026:
1726-1735
Evaluation Warning : The document was created with Spire.PDF for Python.
Int
J
Inf
&
Commun
T
echnol
ISSN:
2252-8776
❒
1731
4.
RESUL
TS
AND
DISCUSSION
The
proposed
SECURE
frame
w
ork
w
as
e
v
aluated
to
assess
its
detection
performance
and
operat
ional
feasibility
under
realistic
t
rading
conditions
[33].
Three
progressi
v
ely
adv
anced
model
congurations
were
implemented:
Model
1,
Model
2,
and
Model
3.
All
models
were
e
v
aluated
using
stratied
v
e-fold
cross-
v
alidation.
Performance
w
as
measured
using
accurac
y
,
precision,
recall,
F1-score,
R
OC–A
UC,
f
alse
positi
v
e
rate,
detection
latenc
y
,
and
memory
usage
[34].
4.1.
Quantitati
v
e
perf
ormance
analysis
The
T
able
2
illustrates
e
v
aluation
of
all
models
using
stratied
v
e-fold
cross-v
alidation.
Perform
ance
w
as
measured
using
accurac
y
,
precision,
recall,
F1-score,
R
OC–A
UC,
f
alse
positi
v
e
rate,
detection
latenc
y
and
memory
usage
[34].
T
able
2.
Performance
comparison
of
model
congurations
Metric
Model
1
Model
2
Model
3
Accurac
y
(%)
93.1
95.9
97.0
Precision
(%)
78.3
85.1
89.4
Recall
(%)
70.0
82.0
87.6
F1-score
(%)
73.1
83.6
88.5
R
OC–A
UC
(%)
89.3
93.9
96.2
F
alse
positi
v
e
rate
0.15
0.10
0.06
Latenc
y
(ms)
5.4
3.2
1.7
Memory
usage
(MB)
∼
100
∼
140
∼
210
Real-time
capability
No
P
artial
Full
4.2.
P
erf
ormance
inter
pr
etation
T
able
2
vi
vidly
represents
the
performance
comparison
of
model
congurations
whereas
the
Figure
3
represents
the
e
v
aluati
on
of
models
based
on
their
performance.
From
an
operational
perspecti
v
e,
these
impro
v
ements
are
particularly
important:
higher
precision
reduces
unnecessary
re
gulatory
w
orkload,
higher
recall
reduces
the
risk
of
undetected
manipulation,
and
lo
wer
f
alse
positi
v
e
rates
impro
v
e
condence
in
automated
surv
eillance.
Figure
3.
Ev
aluation
of
models
based
on
f
alse
positi
v
e
rate,
latenc
y
,
R
OC-A
UC,
and
memory
usage
An
e
xplainable
AI-based
intrusion
detection
system
for
cyber
thr
eats
in
stoc
k
mark
ets
...
(Anandhi
Ramani)
Evaluation Warning : The document was created with Spire.PDF for Python.
1732
❒
ISSN:
2252-8776
4.3.
Explainability
analysis
using
SHAP
4.3.1.
Global
featur
e
importance
An
e
xplainability
analysis
w
as
carried
out
to
determine
if
the
prediction
beha
vior
of
the
frame
w
ork
aligns
with
what
mark
et
manipulation
e
xperts
kno
w
about
it
[35].
Across
all
model
congurations,
SHAP
anal-
ysis
consis
tently
identied
the
most
inuential
beha
vioural
indicators:
short-windo
w
cancellation
rate,
relati
v
e
order
size,
order
book
imbalance
surv
eillance,
trader
submission
frequenc
y
,
and
short-term
price
mo
v
ement.
The
strong
alignment
between
SHAP-deri
v
ed
feature
rankings
and
established
nancial
microstructure
[36]
theory
conrms
that
the
model’
s
internal
reasoning
reects
e
xpert
kno
wledge,
which
is
essential
for
re
gulatory
acceptance
[37].
4.3.2.
Local
trade-le
v
el
explanations
At
the
indi
vidual
trade
le
v
el,
SHAP
e
xplanat
ions
indicated
that
suspicious
classications
were
primar
-
ily
dri
v
en
by:
rapid
order
cancellations,
abnormally
lar
ge
order
placements,
and
high-frequenc
y
submissions.
4.4.
Operational
system
perf
ormance
The
full
SECURE
model
generated
real-time
alerts
in
under
tw
o
milliseconds,
meeting
the
opera-
tional
requirements
of
e
xchange-le
v
el
monitoring
[38].
The
IDS
layer
substantially
impro
v
ed
alert
quality
by
correlating
e
v
ent
s
across
tim
e
windo
ws
and
trader
identities,
thereby
reducing
redundant
alerts
and
increasing
o
v
erall
precision.
Arin
[39]
the
feedback-dri
v
en
enhancement
module
demonstrated
adapti
v
e
learning
capa-
bility
.
The
introduction
of
a
small
proportion
of
analyst-v
al
idated
feedback
resulted
in:
impro
v
ed
prediction
stability
,
reduced
f
alse
alert
rates,
and
f
aster
con
v
er
gence
during
retraining.
4.5.
Comparati
v
e
analysis
among
peer
system
In
contrast
to
traditional
rule-bas
ed
surv
eillance
systems,
which
are
rigid
and
prone
to
alert
saturation,
SECURE
achie
v
es
a
balanced
inte
gration
of:
adaptability
through
machine
learning,
control
through
rule-based
logic,
and
transparenc
y
through
SHAP-based
e
xplainability
.
4.6.
Use-case
v
alidation
T
w
o
representati
v
e
mark
et
scenarios
were
used
to
v
alidate
practical
applicability:
a
spoong
cluster
scenario,
in
which
rapid
lar
ge-order
cancellations
were
accurately
detected
and
clearly
e
xplai
ned
[39],
and
a
v
olatile
mark
et
layering
scenario,
where
articial
order
book
depth
w
as
successfully
identied
through
IDS-
based
session
correlation
[40],
[41].
These
cases
conrm
that
the
frame
w
ork
performs
reliably
not
only
in
controlled
e
xperimental
settings
b
ut
also
under
realistic
mark
et
conditions.
5.
CONCLUSION
SECURE
is
the
name
of
the
XAI-based
intrusion
detection
system
proposed
in
this
paper
for
detecting
and
e
xplaining
instances
of
fraudulent
beha
viors
such
as
spoong
and
layering
in
high-frequenc
y
trading
-
nancial
mark
et
en
vironment.
The
proposed
methodology
combines
the
po
wer
of
machine
learning
algorithms,
c
ybersecurity-based
techniques,
and
XAI
to
o
v
ercome
the
dra
wbacks
of
tradi
tional
rule-based
and
opaque
sys-
tems.
Experiments
conducted
sho
w
that
SECURE
pro
vides
e
xcellent
detection
accurac
y
,
lo
w
f
alse
positi
v
e
detection
rate,
and
good
computational
ef
cienc
y
which
allo
ws
the
frame
w
ork
to
be
used
in
the
real-time
mark
et
surv
eillance
system.
In
addition,
the
use
of
SHAP-based
e
xplanations
helps
mak
e
the
results
more
interpretable
by
nding
the
top
important
feature
contrib
utions
in
each
detection.
Due
to
the
implementation
of
an
adapti
v
e
feedback
loop
system,
the
proposed
scheme
is
able
to
consist
ently
update
its
detection
approach
to
counteract
ne
wly
de
v
eloped
manipulati
v
e
approaches,
thus
increasing
its
stability
o
v
er
time.
Future
w
ork
will
in
v
olv
e
e
xpanding
the
scope
of
SECURE
frame
w
ork
to
include
more
types
of
mark
et
manipulations,
such
as
w
ash
trading,
front
running,
and
quote
stuf
ng.
Future
impro
v
ements
in
the
frame
w
ork
will
also
in
v
olv
e
inte
gration
of
multimodal
e
xternal
data
sources
lik
e
nancial
ne
ws
and
social
media
sentiments
that
will
enrich
conte
xt
intelligence.
Future
w
ork
will
also
in
v
olv
e
de
v
eloping
the
frame
w
ork
with
adv
ersarial
rob
ustness,
in-
creasing
computational
ef
cienc
y
to
scale
up
to
a
bigger
size
and
also
using
real-w
orld
datasets
in
association
with
re
gulatory
authorities
and
stock
e
xchanges
to
v
alidate
the
proposed
frame
w
ork.
Int
J
Inf
&
Commun
T
echnol,
V
ol.
15,
No.
4,
December
2026:
1726-1735
Evaluation Warning : The document was created with Spire.PDF for Python.
Int
J
Inf
&
Commun
T
echnol
ISSN:
2252-8776
❒
1733
FUNDING
INFORMA
TION
The
authors
ackno
wledge
the
nancial
support
pro
vided
by
Dw
araka
Doss
Go
v
erdhan
Doss
V
aishna
v
Colle
ge,
Chennai,
through
the
Research
De
v
elopment
Cell
and
colle
ge
management,
which
sanctioned
seed
funding
to
support
the
research
acti
vities
reported
in
this
study
.
No
e
xternal
funding
agenc
y
w
as
in
v
olv
ed
in
this
w
ork.
A
UTHOR
CONTRIB
UTIONS
ST
A
TEMENT
This
journal
uses
the
Contrib
utor
Roles
T
axonomy
(CRediT)
to
recognize
indi
vidual
author
contrib
utions,
reduce
authorship
disputes,
and
f
acilitate
collaboration.
Name
of
A
uthor
C
M
So
V
a
F
o
I
R
D
O
E
V
i
Su
P
Fu
Anandhi
Ramani
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
Malath
y
S.
✓
✓
✓
✓
✓
✓
✓
✓
✓
✓
Ramya
K.
✓
✓
✓
✓
✓
✓
✓
C
:
C
onceptualization
I
:
I
n
v
estig
ation
V
i
:
V
i
sualization
M
:
M
ethodology
R
:
R
esources
Su
:
Su
pervision
So
:
So
ftw
are
D
:
D
ata
Curation
P
:
P
roject
Administration
V
a
:
V
a
lidation
O
:
Writing
-
O
riginal
Draft
Fu
:
Fu
nding
Acquisition
F
o
:
F
o
rmal
Analysis
E
:
Writing
-
Re
vie
w
&
E
diting
CONFLICT
OF
INTEREST
ST
A
TEMENT
Authors
state
no
conict
of
interest.
D
A
T
A
A
V
AILABILITY
The
data
that
support
the
ndings
of
this
study
are
a
v
ailable
upon
reasonable
request.
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al,
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29.
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An
e
xplainable
AI-based
intrusion
detection
system
for
cyber
thr
eats
in
stoc
k
mark
ets
...
(Anandhi
Ramani)
Evaluation Warning : The document was created with Spire.PDF for Python.
1734
❒
ISSN:
2252-8776
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Evaluation Warning : The document was created with Spire.PDF for Python.
Int
J
Inf
&
Commun
T
echnol
ISSN:
2252-8776
❒
1735
BIOGRAPHIES
OF
A
UTHORS
Dr
.
Anandhi
Ramani
is
an
academician
in
the
eld
of
computer
applications
with
a
strong
focus
on
teaching,
curriculum
de
v
elopment,
and
research-oriented
learning.
She
has
been
acti
v
ely
in
v
olv
ed
i
n
designing
outcome-based
curricula,
mentoring
students,
and
inte
grating
emer
ging
tech-
nologies
such
as
cloud
computing,
serv
erless
computing,
c
ybersecurity
,
and
data-dri
v
en
applications
into
academic
programs.
Her
academic
interests
include
impro
ving
pedagogical
practices
for
di
v
erse
learners,
guiding
stude
nt
projects,
and
contrib
uting
to
research
publications
and
quality
assurance
acti
vities
in
higher
education.
She
can
be
contacted
at
email:
sekadhi@gmail.com.
Malath
y
S.
is
a
full-time
Ph.D.
research
scholar
in
the
PG
and
Research
Department
of
Computer
Science
at
Dw
araka
Doss
Go
v
erdhan
Doss
V
aishna
v
Colle
ge,
Chennai,
T
amil
Nadu,
India.
She
holds
a
master’
s
de
gree
in
Computer
Applications
and
has
qualied
the
UGC-NET
e
xamination
in
Computer
Science
and
Applications
.
Her
research
interests
include
c
ybersecurity
,
stock
mark
et
manipulation
detection,
e
xplainable
articial
intelligence,
intrusion
detection
systems,
and
nancial
data
analytics.
She
can
be
contacted
at
email:
malath
y10112001@gmail.com.
Ramya
K.
is
a
f
aculty
member
in
the
eld
of
computer
science
with
a
s
trong
focus
on
soft-
w
are
engineering
and
system
modeling.
Her
research
interests
include
Unied
Modeling
Language,
softw
are
design
methodologies,
and
the
int
e
gration
of
emer
ging
technologies
in
education
and
or
g
a-
nizational
sys
tems.
She
acti
v
ely
eng
ages
in
scholarly
research,
academic
writing,
and
conference-
oriented
studies
to
enhance
both
theoretical
and
practical
kno
wledge.
She
participates
in
f
aculty
de
v
elopment
and
induction
programs
to
strengthen
her
research
and
pedagogical
competencies.
Her
academic
goal
is
to
contrib
ute
high-quality
research
that
supports
inno
v
ation,
ef
fecti
v
e
teaching,
and
kno
wledge
dissemination.
She
can
be
contacted
at
email:
ramya.dgvc2024@gmail.com.
An
e
xplainable
AI-based
intrusion
detection
system
for
cyber
thr
eats
in
stoc
k
mark
ets
...
(Anandhi
Ramani)
Evaluation Warning : The document was created with Spire.PDF for Python.