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is
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in
c
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b
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im
p
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tan
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f
co
m
p
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f
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n
s
ics.
Or
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an
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s
ar
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in
cr
ea
s
in
g
ly
f
in
d
in
g
it
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eith
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s
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s
e
o
f
co
m
p
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ter
s
an
d
d
ig
ital
tech
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o
lo
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y
.
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h
e
s
u
b
s
tan
tial
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o
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id
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ac
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a
n
d
p
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cr
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als.
As
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cr
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k
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,
co
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p
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s
,
an
d
d
ig
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s
to
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ag
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d
ev
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I
t
in
v
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lv
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a
s
y
s
tem
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ap
p
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ac
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to
d
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in
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c
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llectin
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p
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al
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d
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ital
ev
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ce
in
s
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ch
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at
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p
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t.
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s
s
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tially
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co
m
p
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is
co
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r
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u
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ally
s
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ev
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p
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s
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Her
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ar
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t
h
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d
is
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s
tag
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th
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co
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p
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f
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v
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ss:
Evaluation Warning : The document was created with Spire.PDF for Python.
I
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&
C
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p
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n
g
I
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N:
2088
-
8
7
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a
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b
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…
(
S
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in
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s
K
a
n
a
k
a
la
)
4023
−
Pre
-
in
v
esti
g
atio
n
p
h
ase:
T
h
is
in
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p
h
ase
in
clu
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es
all
p
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ep
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y
ac
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−
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ess
io
n
als
en
s
u
r
e
th
e
p
r
ec
is
io
n
an
d
i
n
teg
r
ity
o
f
th
e
in
v
esti
g
ativ
e
p
r
o
ce
s
s
.
−
Po
s
t
-
in
v
esti
g
atio
n
p
h
ase:
T
h
is
f
in
al
p
h
ase
i
n
v
o
lv
es
co
m
p
ilin
g
a
n
d
d
o
c
u
m
en
tin
g
all
ac
ti
v
ities
an
d
r
esu
lts
f
r
o
m
th
e
i
n
v
esti
g
atio
n
.
T
h
e
g
o
al
is
to
p
r
o
d
u
ce
a
r
ep
o
r
t
th
at
is
co
m
p
r
eh
en
s
ib
le
to
its
in
ten
d
ed
r
ea
d
er
s
a
n
d
p
r
o
v
id
es
r
o
b
u
s
t
an
d
ad
m
is
s
ib
le
ev
id
en
ce
.
T
h
e
r
e
p
o
r
t
m
u
s
t
ad
h
er
e
t
o
th
e
s
p
ec
if
ic
r
ep
o
r
tin
g
s
tan
d
a
r
d
s
o
f
ea
ch
ju
r
is
d
ictio
n
an
d
b
e
le
g
ally
r
o
b
u
s
t to
with
s
tan
d
s
cr
u
tin
y
in
a
co
u
r
t
o
f
law.
Data
ac
q
u
is
itio
n
s
er
v
es
as
th
e
in
itial
ac
tiv
e
p
h
ase
in
th
e
f
o
r
en
s
ic
in
v
esti
g
atio
n
p
r
o
ce
s
s
.
T
h
is
p
r
o
ce
s
s
in
v
o
lv
es
m
o
r
e
th
a
n
ju
s
t
tr
a
n
s
f
er
r
in
g
f
iles
f
r
o
m
o
n
e
d
e
v
ice
to
an
o
th
er
.
Fo
r
en
s
ic
d
ata
a
cq
u
is
itio
n
aim
s
to
ca
p
tu
r
e
e
v
er
y
s
in
g
le
p
iece
o
f
in
f
o
r
m
atio
n
f
r
o
m
th
e
m
em
o
r
y
an
d
s
to
r
ag
e
o
f
th
e
a
f
f
ec
ted
s
y
s
tem
to
cr
ea
te
a
f
o
r
en
s
ic
r
ep
lica
o
f
th
is
d
ata.
I
m
p
o
r
tan
tly
,
th
is
r
ep
lica
m
u
s
t
b
e
m
ad
e
in
a
way
th
at
p
r
eser
v
es
th
e
d
ata'
s
in
teg
r
ity
,
e
n
s
u
r
in
g
it
r
em
ain
s
v
er
if
iab
le
an
d
ad
m
is
s
ib
le
i
n
co
u
r
t
p
r
o
ce
e
d
in
g
s
.
T
h
is
s
e
ctio
n
ex
p
lo
r
es
t
h
e
ess
en
tial
p
r
in
cip
les
o
f
d
ata
ac
q
u
is
itio
n
an
d
o
u
tlin
es
th
e
s
te
p
s
in
v
o
lv
ed
in
th
e
d
ata
ac
q
u
i
s
itio
n
m
eth
o
d
o
lo
g
y
.
T
o
co
m
m
en
ce
a
f
o
r
e
n
s
ic
ex
am
in
atio
n
o
f
a
p
o
ten
tial
ev
id
e
n
ce
s
o
u
r
ce
,
in
v
esti
g
ato
r
s
m
u
s
t
f
ir
s
t
r
ep
licate
th
e
d
ata
f
o
u
n
d
o
n
an
y
d
ig
ital
s
to
r
ag
e
m
ed
iu
m
s
at
th
e
cr
im
e
s
ce
n
e,
s
u
ch
as
a
h
a
r
d
d
is
k
.
T
h
is
r
ep
licatio
n
ca
n
b
e
co
n
d
u
cte
d
eith
er
d
ir
ec
tly
at
t
h
e
cr
im
e
s
ce
n
e
o
r
a
f
ter
tr
a
n
s
p
o
r
tin
g
th
e
d
ev
ice
to
a
s
ec
u
r
e
lo
ca
tio
n
f
o
r
f
u
r
th
e
r
an
aly
s
is
.
Fo
r
en
s
ic
d
ata
ac
q
u
is
itio
n
is
th
e
p
r
o
ce
s
s
o
f
s
y
s
tem
atica
lly
im
ag
in
g
o
r
co
llectin
g
in
f
o
r
m
atio
n
f
r
o
m
v
ar
io
u
s
m
ed
ia
u
s
in
g
s
tan
d
ar
d
i
ze
d
m
eth
o
d
s
to
p
r
eser
v
e
its
f
o
r
en
s
ic
v
alu
e.
I
t
in
v
o
l
v
es
ex
tr
ac
tin
g
elec
tr
o
n
ically
s
to
r
ed
in
f
o
r
m
atio
n
(
E
SI)
f
r
o
m
p
o
ten
tial
s
u
s
p
ec
t
co
m
p
u
te
r
s
o
r
s
to
r
ag
e
m
ed
ia
to
an
al
y
ze
a
cr
im
e
o
r
in
cid
e
n
t.
As
tech
n
o
lo
g
y
ad
v
a
n
ce
s
,
d
a
ta
ac
q
u
is
itio
n
m
eth
o
d
s
h
av
e
b
ec
o
m
e
m
o
r
e
ac
c
u
r
ate,
s
i
m
p
le,
an
d
f
lex
ib
le.
No
n
eth
eless
,
it
is
cr
u
cial
f
o
r
in
v
esti
g
ato
r
s
to
u
s
e
a
n
ac
q
u
is
itio
n
m
eth
o
d
o
lo
g
y
th
at
is
f
o
r
en
s
ically
s
o
u
n
d
,
m
ea
n
in
g
it
s
h
o
u
l
d
b
e
b
o
th
v
er
if
iab
le
an
d
r
ep
e
atab
le.
T
h
is
is
im
p
o
r
tan
t
to
e
n
s
u
r
e
th
e
ad
m
is
s
ib
ilit
y
o
f
th
e
d
ata
o
r
ev
id
e
n
ce
in
a
c
o
u
r
t
o
f
law.
A
cr
itical
asp
ec
t
o
f
f
o
r
en
s
ic
d
ata
ac
q
u
is
itio
n
is
tim
in
g
.
Da
ta
s
to
r
ed
o
n
ce
r
tain
m
ed
iu
m
s
lik
e
h
ar
d
d
r
iv
es c
an
r
em
ain
u
n
c
h
an
g
e
d
an
d
ca
n
b
e
co
llected
ev
en
af
ter
th
e
s
y
s
te
m
h
as b
ee
n
p
o
wer
e
d
d
o
wn
.
Ho
wev
er
,
d
ata
s
to
r
ed
o
n
v
o
latile
s
o
u
r
ce
s
s
u
ch
as
R
A
M
is
d
y
n
am
ic
an
d
m
u
s
t
b
e
co
llected
im
m
ed
iately
b
ec
au
s
e
it
is
lo
s
t
wh
en
th
e
p
o
wer
is
tu
r
n
ed
o
f
f
o
r
i
f
th
e
s
y
s
tem
is
r
eb
o
o
ted
.
T
h
is
s
tu
d
y
ex
p
lo
r
es
v
ar
io
u
s
f
o
r
en
s
ic
to
o
ls
an
d
v
alid
atio
n
tech
n
iq
u
es
to
id
en
tif
y
ef
f
ec
t
iv
e
m
eth
o
d
o
lo
g
ies
f
o
r
ac
q
u
ir
in
g
an
d
p
r
eser
v
in
g
d
ig
ital
ev
id
en
ce
.
B
y
an
aly
zin
g
th
ese
ap
p
r
o
ac
h
es,
th
e
r
esear
ch
aim
s
to
en
h
an
ce
f
o
r
en
s
ic
in
v
esti
g
atio
n
s
am
id
s
t
ev
o
lv
in
g
cy
b
er
th
r
ea
ts
.
2.
L
I
T
E
R
AT
U
RE
SU
RVE
Y
T
h
e
f
ield
o
f
f
o
r
en
s
ic
d
ata
a
cq
u
is
itio
n
h
as
g
ar
n
er
ed
c
o
n
s
i
d
er
ab
le
atten
tio
n
f
r
o
m
r
esear
ch
er
s
an
d
p
r
ac
titi
o
n
er
s
alik
e,
lead
in
g
to
a
wea
lth
o
f
ex
is
tin
g
liter
atu
r
e
ex
p
lo
r
i
n
g
v
a
r
io
u
s
asp
ec
ts
o
f
d
ig
ital
ev
id
e
n
ce
co
llectio
n
an
d
p
r
eser
v
atio
n
.
Sev
er
al
n
o
tab
le
p
ap
e
r
s
h
av
e
co
n
tr
ib
u
ted
s
ig
n
i
f
ican
tly
to
o
u
r
u
n
d
er
s
tan
d
in
g
o
f
f
o
r
en
s
ic
d
ata
ac
q
u
is
itio
n
m
et
h
o
d
o
lo
g
ies,
to
o
ls
,
an
d
b
est
p
r
ac
tices.
On
e
s
em
in
al
wo
r
k
in
th
is
d
o
m
ain
is
th
e
p
ap
er
b
y
Ko
h
n
et
a
l.
[
1
]
,
p
r
o
p
o
s
ed
a
s
tan
d
ar
d
ized
d
ig
ital
f
o
r
e
n
s
ic
p
r
o
ce
s
s
m
o
d
el
t
o
a
id
in
v
esti
g
ato
r
s
in
f
o
llo
win
g
a
u
n
if
o
r
m
ap
p
r
o
ac
h
in
d
ig
ital
f
o
r
en
s
ic
in
v
esti
g
ati
o
n
s
.
A
co
m
p
r
e
h
en
s
iv
e
s
tu
d
y
b
y
C
asey
an
d
R
o
s
e
[
2
]
d
elv
es
in
to
th
e
in
tr
icac
ies
o
f
f
o
r
en
s
ic
im
ag
in
g
an
d
a
cq
u
i
s
itio
n
,
ex
am
in
in
g
d
i
f
f
er
e
n
t
ap
p
r
o
ac
h
es
f
o
r
ca
p
tu
r
in
g
d
ata
f
r
o
m
s
to
r
ag
e
d
ev
ices
wh
ile
m
ain
tain
in
g
d
ata
in
teg
r
ity
.
T
h
e
p
a
p
er
d
is
cu
s
s
es
v
ar
io
u
s
im
ag
in
g
to
o
ls
an
d
m
eth
o
d
o
lo
g
ies,
in
f
o
r
en
s
ic
in
v
esti
g
atio
n
s
.
Gen
g
en
b
ac
h
et
a
l.
[
3
]
,
p
r
esen
ts
p
r
eli
m
in
ar
y
r
esu
lts
f
r
o
m
o
n
g
o
in
g
r
esear
ch
co
n
d
u
cted
a
s
p
ar
t
o
f
th
e
B
itC
u
r
ato
r
p
r
o
jec
t,
a
two
-
y
ea
r
g
r
an
t
f
u
n
d
ed
i
n
itiativ
e
to
b
u
ild
,
test
,
an
d
an
aly
ze
s
y
s
tem
s
an
d
s
o
f
twar
e
f
o
r
in
c
o
r
p
o
r
atin
g
d
ig
it
al
f
o
r
en
s
ics
m
eth
o
d
s
in
to
co
l
lectin
g
in
s
titu
tio
n
s
'
wo
r
k
f
lo
ws.
T
h
e
p
ap
er
b
y
Hu
e
b
n
er
et
a
l.
[
4
]
e
x
p
lo
r
es
th
e
u
s
e
o
f
v
o
latile
m
em
o
r
y
f
o
r
e
n
s
ics
f
o
r
ac
q
u
ir
i
n
g
an
d
an
aly
zin
g
v
o
latile
d
ata
f
r
o
m
l
iv
e
s
y
s
tem
s
,
o
f
f
er
in
g
in
s
ig
h
ts
in
to
th
e
ev
o
lv
i
n
g
lan
d
s
ca
p
e
o
f
d
ig
ital
ev
id
e
n
ce
co
llectio
n
.
B
r
ain
an
d
Sm
ith
[
5
]
p
r
o
v
id
es
an
o
v
er
v
iew
o
f
r
ec
e
n
t
ad
v
an
ce
m
en
ts
in
f
o
r
en
s
ic
im
ag
in
g
tech
n
iq
u
es,
f
o
cu
s
in
g
o
n
em
e
r
g
in
g
tech
n
o
lo
g
ies
an
d
m
eth
o
d
o
lo
g
ies
f
o
r
ca
p
tu
r
i
n
g
an
d
p
r
eser
v
in
g
d
ig
ital
ev
id
en
ce
.
Ab
io
d
u
n
et
a
l.
[
6
]
p
a
p
er
ex
p
lo
r
es
th
e
u
n
iq
u
e
c
h
allen
g
es
ass
o
ciate
d
with
f
o
r
en
s
ic
d
ata
ac
q
u
is
itio
n
in
clo
u
d
en
v
ir
o
n
m
en
ts
an
d
p
r
esen
ts
in
n
o
v
ativ
e
s
o
l
u
tio
n
s
to
ad
d
r
e
s
s
th
ese
ch
00
a
llen
g
es.
Kim
an
d
L
ee
[
7
]
p
a
p
er
ex
am
in
es
th
e
u
n
iq
u
e
ch
alle
n
g
es
an
d
s
o
lu
tio
n
s
in
m
o
b
i
le
f
o
r
en
s
ic
d
ata
ac
q
u
is
itio
n
,
f
o
cu
s
in
g
o
n
th
e
co
m
p
lex
ities
o
f
ex
tr
ac
tin
g
d
ig
ital
ev
id
en
ce
f
r
o
m
s
m
ar
tp
h
o
n
es
an
d
o
t
h
er
m
o
b
ile
d
ev
ic
es.
Pan
g
et
a
l.
[
8
]
p
r
esen
ts
an
o
v
er
v
iew
o
f
n
ex
t
-
g
en
er
atio
n
f
o
r
en
s
ic
im
ag
in
g
t
ec
h
n
iq
u
es,
h
ig
h
lig
h
tin
g
r
ec
en
t
tr
en
d
s
an
d
f
u
tu
r
e
d
ir
ec
tio
n
s
in
th
e
f
ield
.
T
h
e
a
u
th
o
r
s
d
is
cu
s
s
ad
v
an
ce
m
e
n
ts
in
h
ar
d
war
e
-
b
ased
im
ag
in
g
s
o
lu
t
io
n
s
,
s
u
ch
as
s
o
lid
-
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
0
8
8
-
8
7
0
8
I
n
t J E
lec
&
C
o
m
p
E
n
g
,
Vo
l.
15
,
No
.
4
,
Au
g
u
s
t
20
25
:
4
0
2
2
-
4030
4024
s
tate
d
r
iv
e
(
SS
D)
f
o
r
en
s
ics
an
d
f
ir
m
war
e
-
lev
el
ac
q
u
is
itio
n
m
eth
o
d
s
.
Fak
h
o
u
r
i
et
a
l
.
an
d
J
av
ed
et
a
l
.
[
9
]
,
[
1
0
]
ex
p
lo
r
es
th
e
u
s
e
o
f
o
p
e
n
-
s
o
u
r
ce
an
d
co
m
m
er
cial
f
o
r
en
s
ic
to
o
ls
,
ch
allen
g
es
cy
b
e
r
f
o
r
en
s
ic
f
r
am
ewo
r
k
s
an
d
s
tan
d
ar
d
s
,
an
d
b
est
p
r
ac
tices
in
cy
b
er
f
o
r
en
s
ic
in
v
esti
g
ati
o
n
s
.
Pra
s
an
th
i
[
1
1
]
,
Sin
d
h
u
an
d
Me
s
h
r
am
[
1
2
]
d
escr
ib
es
im
p
o
r
tan
ce
o
f
co
m
p
u
ter
f
o
r
e
n
s
ics
an
d
its
o
r
ig
in
,
f
o
r
en
s
ic
f
r
am
ewo
r
k
an
d
d
if
f
er
e
n
t
ty
p
es
o
f
ex
is
tin
g
co
m
p
u
ter
f
o
r
en
s
ic
to
o
ls
an
d
its
u
s
ag
e.
T
ag
eld
in
an
d
Ven
ter
[
1
3
]
s
h
o
ws
th
at
m
ac
h
in
e
lear
n
in
g
alg
o
r
ith
m
s
ca
n
b
e
u
s
ed
f
o
r
p
r
ed
ictio
n
s
o
f
d
if
f
er
en
t
asp
ec
ts
an
d
in
f
o
r
en
s
ics
also
.
B
ar
ik
et
a
l
.,
Kam
b
le
a
n
d
J
ain
,
an
d
L
o
v
an
s
h
i
an
d
B
an
s
al
[
1
4
]
–
[
1
6
]
s
h
o
ws
s
y
s
tem
atic
ap
p
r
o
ac
h
u
s
in
g
ar
t
if
icial
in
tellig
en
ce
to
en
a
b
le
t
h
e
s
y
s
tem
s
ec
u
r
ity
team
to
f
ac
ilit
ate
th
e
p
r
o
ce
s
s
o
f
co
n
d
u
ctin
g
a
s
ec
u
r
ity
a
u
d
it
tak
in
g
i
n
to
ac
co
u
n
t
th
e
s
en
s
itiv
ity
o
f
th
eir
s
y
s
tem
s
.
M
ac
h
in
e
lear
n
in
g
alg
o
r
ith
m
s
ca
n
also
b
e
u
s
ed
f
o
r
p
r
ed
ictio
n
o
f
d
is
ea
s
es
[
1
7
]
–
[
1
9
]
.
Awa
d
et
al.
,
E
d
en
et
al.
,
an
d
Ku
r
k
o
wsk
i
a
n
d
Sh
en
o
i
[
2
0
]
–
[
2
2
]
p
r
esen
ts
a
s
u
r
v
e
y
in
to
th
e
liter
atu
r
e
o
n
d
ig
ital
f
o
r
en
s
ics
ap
p
lied
to
SC
ADA
s
y
s
tem
s
.
Du
b
ey
et
a
l
.
[
2
3
]
,
[
2
4
]
d
is
cu
s
s
th
e
to
o
ls
in
f
o
r
en
s
ics.
Du
b
ey
et
a
l
.
,
S.
Vö
m
el
an
d
J
.
Stü
ttg
en
,
an
d
Sh
r
ee
[
2
4
]
–
[
2
6
]
s
tu
d
y
th
e
c
o
m
p
lex
ity
a
n
d
r
ea
d
in
ess
o
f
co
m
m
u
n
ity
-
ac
ce
p
ted
d
ev
ices
in
a
s
m
ar
t
ap
p
licatio
n
to
war
d
s
a
s
s
is
tan
ce
in
cr
im
in
al
in
v
esti
g
atio
n
s
an
d
also
m
em
o
r
y
f
o
r
en
s
ics
ac
q
u
is
itio
n
tech
n
iq
u
es
ar
e
d
is
cu
s
s
ed
.
T
h
e
p
r
o
p
o
s
ed
s
y
s
tem
i
n
tr
o
d
u
ce
s
a
n
in
teg
r
ate
d
to
o
ls
et
th
at
co
m
b
in
es
f
u
n
ctio
n
alities
f
r
o
m
e
x
is
tin
g
to
o
ls
lik
e
B
elk
a
s
o
f
t
L
iv
e
R
AM
C
ap
tu
r
er
an
d
Acc
ess
Data
FTK
I
m
ag
er
,
en
s
u
r
in
g
s
ea
m
less
d
ata
ca
p
tu
r
e
ac
r
o
s
s
v
ar
io
u
s
o
p
e
r
atin
g
s
y
s
tem
s
an
d
d
e
v
ices.
R
ea
l
-
tim
e
v
alid
atio
n
m
ec
h
a
n
is
m
s
ar
e
im
p
lem
en
te
d
to
m
ain
tain
d
ata
in
teg
r
ity
th
r
o
u
g
h
o
u
t th
e
ac
q
u
is
itio
n
p
r
o
ce
s
s
,
m
in
im
izin
g
er
r
o
r
s
an
d
d
is
cr
ep
an
cies.
3.
M
E
T
H
O
DO
L
O
G
Y
T
h
is
s
ec
tio
n
d
is
cu
s
s
es
th
e
v
a
r
io
u
s
s
tep
s
th
at
in
v
esti
g
ato
r
s
n
ee
d
to
u
n
d
er
tak
e
to
ef
f
ec
tiv
ely
co
llect
d
ata
th
at
h
o
ld
s
ev
id
e
n
tiar
y
v
al
u
e.
W
h
en
c
o
n
d
u
ctin
g
f
o
r
e
n
s
ic
d
ata
ac
q
u
is
itio
n
,
it
is
ess
en
tial
to
ca
r
ef
u
lly
s
elec
t
ap
p
r
o
ac
h
es
an
d
m
eth
o
d
o
lo
g
ie
s
th
at
p
r
eser
v
e
th
e
in
teg
r
ity
an
d
ac
cu
r
ac
y
o
f
th
e
o
r
i
g
in
al
e
v
id
en
ce
.
T
h
e
d
ata
ac
q
u
is
itio
n
p
r
o
ce
s
s
m
u
s
t
ad
h
er
e
to
d
ep
a
r
tm
en
tal
o
r
o
r
g
an
izatio
n
al
p
o
licies
an
d
c
o
m
p
ly
with
r
elev
an
t
s
tan
d
ar
d
s
,
r
eg
u
latio
n
s
,
an
d
l
aws.
Ad
d
itio
n
ally
,
in
v
esti
g
ato
r
s
s
h
o
u
ld
en
s
u
r
e
th
at
th
e
d
ata
ac
q
u
is
itio
n
is
p
er
f
o
r
m
ed
in
a
f
o
r
en
s
icall
y
s
o
u
n
d
m
an
n
er
.
T
h
is
in
clu
d
es
au
th
en
ticatin
g
th
e
in
teg
r
ity
o
f
th
e
ac
q
u
ir
ed
d
ata
im
ag
e
u
s
in
g
h
ash
alg
o
r
ith
m
s
,
wh
ich
h
elp
v
er
i
f
y
th
at
th
e
d
ata
h
as
n
o
t
b
ee
n
alter
ed
f
r
o
m
its
o
r
ig
in
al
s
tate.
Fig
u
r
e
1
r
e
p
r
esen
ts
b
lo
ck
d
iag
r
am
o
f
d
ata
ac
q
u
is
itio
n
m
et
h
o
d
o
lo
g
y
.
Fig
u
r
e
1
.
B
lo
ck
d
iag
r
am
o
f
d
a
ta
ac
q
u
is
itio
n
m
eth
o
d
o
lo
g
y
Step
1
:
d
eter
m
in
e
th
e
b
est
d
ata
ac
q
u
is
itio
n
m
eth
o
d
:
I
n
f
o
r
en
s
ic
in
v
esti
g
atio
n
s
,
s
elec
tin
g
th
e
ap
p
r
o
p
r
iate
d
ata
ac
q
u
is
itio
n
m
eth
o
d
is
cr
u
cial
f
o
r
en
s
u
r
in
g
d
ata
in
teg
r
ity
an
d
leg
al
ad
m
is
s
ib
ilit
y
.
Fo
r
lar
g
e
s
u
s
p
ec
t
d
r
iv
es,
d
is
k
-
to
-
im
a
g
e
co
p
y
in
g
is
p
r
ef
er
r
ed
,
b
u
t
if
s
t
o
r
ag
e
is
lim
ited
,
d
ata
s
ize
ca
n
b
e
r
e
d
u
ce
d
u
s
in
g
co
m
p
r
ess
io
n
to
o
ls
lik
e
Mic
r
o
s
o
f
t
Dr
iv
eSp
ac
e,
D
o
u
b
leSp
ac
e,
PKZip
,
W
in
Z
ip
,
o
r
W
in
R
AR
to
elim
in
ate
s
lack
s
p
ac
e.
I
n
teg
r
ity
v
er
if
icatio
n
th
r
o
u
g
h
h
ash
v
alu
es
s
u
ch
as
MD
5
,
SHA
-
2
,
o
r
SHA
-
3
b
e
f
o
r
e
an
d
af
ter
co
m
p
r
ess
io
n
en
s
u
r
es
lo
s
s
less
d
ata
r
eten
tio
n
.
Sin
ce
ac
q
u
is
itio
n
tim
e
d
ep
e
n
d
s
o
n
d
r
iv
e
s
ize
(
e.
g
.
,
a
1
T
B
d
r
iv
e
m
ay
tak
e
o
v
er
1
1
h
o
u
r
s
)
,
in
v
e
s
tig
ato
r
s
s
h
o
u
ld
p
r
i
o
r
itize
r
ele
v
an
t
d
ata
to
o
p
tim
ize
tim
e
a
n
d
r
eso
u
r
ce
s
.
I
n
ca
s
es
wh
er
e
th
e
o
r
ig
in
al
d
r
i
v
e
m
u
s
t
r
em
a
in
u
n
to
u
c
h
ed
,
s
u
ch
as
in
civ
il
liti
g
atio
n
,
lo
g
ical
ac
q
u
is
itio
n
m
ay
b
e
an
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
t J E
lec
&
C
o
m
p
E
n
g
I
SS
N:
2088
-
8
7
0
8
N
a
vig
a
tin
g
cy
b
er in
ve
s
tig
a
tio
n
s
:
s
tr
a
teg
ies a
n
d
to
o
ls
fo
r
fo
r
en
s
ic
d
a
ta
…
(
S
r
in
iva
s
K
a
n
a
k
a
la
)
4025
o
p
tio
n
.
W
h
en
p
o
s
s
ib
le,
cr
ea
tin
g
a
r
eliab
le
co
p
y
u
s
in
g
tr
u
s
ted
f
o
r
en
s
ic
to
o
ls
is
ess
en
tial,
as i
n
v
esti
g
atio
n
s
o
f
ten
allo
w
o
n
ly
o
n
e
o
p
p
o
r
tu
n
ity
t
o
ca
p
tu
r
e
d
ata
ac
cu
r
ately
.
A
th
o
r
o
u
g
h
ev
alu
atio
n
o
f
th
ese
f
ac
to
r
s
en
s
u
r
es
a
n
ef
f
icien
t a
n
d
le
g
ally
co
m
p
lian
t f
o
r
en
s
ic
p
r
o
ce
s
s
.
Step
2
:
s
elec
t
th
e
d
ata
ac
q
u
is
it
io
n
to
o
l:
Selectin
g
th
e
r
ig
h
t
f
o
r
en
s
ic
d
ata
ac
q
u
is
itio
n
to
o
l
is
cr
u
cial,
as
it
m
u
s
t
m
ee
t
s
tr
ict
s
tan
d
ar
d
s
to
en
s
u
r
e
ac
cu
r
ac
y
an
d
r
eliab
il
ity
.
T
h
e
to
o
l
s
h
o
u
ld
n
o
t
m
o
d
if
y
th
e
o
r
ig
in
al
d
ata
,
lo
g
I
/O
er
r
o
r
s
with
d
etails,
an
d
aler
t
u
s
er
s
if
th
e
d
esti
n
atio
n
s
ize
is
in
s
u
f
f
icien
t.
I
t
m
u
s
t
with
s
tan
d
s
cien
tific
s
cr
u
tin
y
,
ca
p
tu
r
e
all
v
is
ib
le
a
n
d
h
id
d
en
d
ata
s
ec
to
r
s
,
a
n
d
cr
ea
te
a
c
o
m
p
lete
b
it
-
s
tr
ea
m
co
p
y
u
n
less
ac
ce
s
s
er
r
o
r
s
o
cc
u
r
.
I
n
s
u
ch
ca
s
es,
a
q
u
alif
ied
b
it
-
s
tr
ea
m
co
p
y
s
h
o
u
ld
b
e
m
ad
e.
T
h
e
to
o
l
s
h
o
u
ld
o
n
ly
co
p
y
d
ata
if
th
e
d
esti
n
atio
n
is
eq
u
al
to
o
r
lar
g
er
th
an
th
e
s
o
u
r
ce
an
d
m
u
s
t
p
r
o
v
id
e
p
r
ec
is
e
d
o
cu
m
e
n
tatio
n
f
o
r
c
o
n
s
is
ten
t
r
esu
lts
.
Step
3
:
San
itiz
e
th
e
tar
g
et
m
ed
ia:
B
ef
o
r
e
d
ata
ac
q
u
is
itio
n
,
p
r
o
p
er
d
ata
s
an
itizatio
n
is
ess
en
tial
to
p
r
ev
en
t
u
n
au
th
o
r
ized
ac
ce
s
s
to
ex
is
tin
g
in
f
o
r
m
atio
n
o
n
th
e
tar
g
et
m
ed
ia.
Simp
le
d
eletio
n
o
r
f
o
r
m
attin
g
is
in
s
u
f
f
icien
t,
as
d
ata
r
em
ain
s
p
h
y
s
ically
in
tact.
T
o
en
s
u
r
e
c
o
m
p
l
ete
er
asu
r
e,
d
ata
s
h
o
u
ld
b
e
o
v
er
wr
itten
with
s
eq
u
en
tial
ze
r
o
es
o
r
o
n
es.
A
f
ter
d
ata
co
llectio
n
an
d
an
aly
s
i
s
,
s
ec
u
r
e
d
is
p
o
s
al
o
f
m
ed
ia
is
cr
u
cial
to
p
r
ev
e
n
t
r
etr
iev
al.
I
n
v
esti
g
ato
r
s
f
o
llo
w
s
tan
d
ar
d
s
lik
e
th
e
R
u
s
s
ian
GOST
P5
0
7
3
9
-
9
5
(
6
p
ass
es: ze
r
o
s
f
ir
s
t,
th
e
n
r
an
d
o
m
b
y
tes)
o
r
th
e
Ger
m
an
VSI
T
R
(
7
p
ass
es: alter
n
atin
g
0
x
0
0
,
0
x
FF
,
an
d
0
x
AA)
f
o
r
th
o
r
o
u
g
h
d
ata
d
estru
ctio
n
.
Step
4
:
Acq
u
ir
e
v
o
latile
d
ata;
ac
q
u
ir
in
g
v
o
latile
d
ata,
s
u
ch
as
th
e
co
n
ten
ts
o
f
R
AM
,
r
eq
u
ir
es
s
p
ec
ial
atten
tio
n
f
r
o
m
in
v
esti
g
ato
r
s
d
u
e
to
its
d
y
n
am
ic
n
atu
r
e.
W
o
r
k
in
g
o
n
a
liv
e
s
y
s
tem
ca
n
p
o
t
en
tially
alter
R
A
M
co
n
ten
ts
o
r
r
u
n
n
in
g
p
r
o
ce
s
s
es,
lead
in
g
to
u
n
in
ten
d
ed
co
n
s
eq
u
en
ce
s
s
u
ch
as
ch
an
g
es
in
f
ile
ac
ce
s
s
d
ates,
ex
ec
u
tio
n
o
f
m
alwa
r
e,
o
r
s
y
s
tem
r
eb
o
o
ts
th
at
r
en
d
er
th
e
s
y
s
tem
in
ac
ce
s
s
ib
le.
T
h
er
ef
o
r
e,
it'
s
cr
u
cial
to
ap
p
r
o
ac
h
th
e
ex
am
in
atio
n
o
f
a
liv
e
s
y
s
tem
an
d
v
o
latile
d
ata
ac
q
u
is
itio
n
with
ca
u
tio
n
.
W
h
ile
m
o
s
t v
o
latile
d
ata
ca
n
b
e
r
etr
iev
ed
b
y
ex
am
i
n
in
g
th
e
liv
e
s
y
s
tem
d
ir
ec
tly
,
an
eq
u
iv
alen
t
am
o
u
n
t
o
f
d
ata
ca
n
also
b
e
o
b
tain
ed
b
y
an
aly
zin
g
an
im
ag
e
ac
q
u
ir
ed
f
r
o
m
th
e
s
y
s
tem
'
s
m
em
o
r
y
.
T
h
e
f
o
llo
win
g
s
ec
tio
n
s
o
u
tlin
e
th
e
m
eth
o
d
s
f
o
r
ac
q
u
ir
in
g
v
o
latile
d
ata
f
r
o
m
W
in
d
o
ws,
L
in
u
x
,
an
d
Ma
c
s
y
s
tem
s
,
en
s
u
r
in
g
a
th
o
r
o
u
g
h
an
d
ca
r
ef
u
l
a
p
p
r
o
ac
h
t
o
th
e
ac
q
u
is
itio
n
p
r
o
ce
s
s
.
Step
5
:
E
n
a
b
le
wr
ite
p
r
o
tectio
n
o
n
th
e
ev
id
en
ce
m
ed
ia:
W
r
ite
p
r
o
tectio
n
in
v
o
lv
es
im
p
lem
en
tin
g
m
ea
s
u
r
es
to
p
r
e
v
en
t
s
to
r
a
g
e
m
ed
ia
f
r
o
m
b
ein
g
wr
itten
to
o
r
m
o
d
if
ied
.
T
h
is
ca
n
b
e
ac
h
iev
e
d
th
r
o
u
g
h
h
ar
d
war
e
d
ev
ices o
r
s
o
f
twar
e
p
r
o
g
r
am
s
in
s
talled
o
n
th
e
ac
ce
s
s
in
g
co
m
p
u
ter
.
E
n
a
b
lin
g
wr
ite
p
r
o
tectio
n
en
s
u
r
e
s
th
at
d
ata
ca
n
o
n
ly
b
e
r
ea
d
,
p
r
ev
en
ti
n
g
an
y
wr
itin
g
o
r
m
o
d
if
icatio
n
.
I
n
th
e
co
n
tex
t
o
f
f
o
r
en
s
ic
d
ata
ac
q
u
is
itio
n
,
it
'
s
ess
en
tial
to
en
ab
le
wr
ite
p
r
o
t
ec
tio
n
o
n
th
e
e
v
id
en
ce
m
ed
i
a.
T
h
is
r
ef
er
s
to
th
e
s
to
r
ag
e
with
in
th
e
o
r
ig
in
al
d
ev
ice
f
r
o
m
wh
ich
d
ata
is
b
ei
n
g
co
p
ied
o
n
to
a
s
ep
ar
ate
s
to
r
ag
e
d
e
v
ice.
B
y
wr
ite
p
r
o
tectin
g
th
e
ev
id
en
ce
m
ed
ia,
f
o
r
en
s
ic
in
v
esti
g
ato
r
s
s
af
eg
u
ar
d
it
f
r
o
m
an
y
u
n
au
th
o
r
ized
m
o
d
if
icatio
n
s
.
Ma
in
tain
in
g
th
e
in
teg
r
ity
o
f
th
e
ev
id
en
ce
th
r
o
u
g
h
o
u
t
ac
q
u
is
itio
n
,
an
aly
s
is
,
an
d
m
an
ag
em
en
t
is
cr
u
cial
f
o
r
f
o
r
en
s
ic
in
v
esti
g
atio
n
s
.
I
t's
im
p
er
ativ
e
th
at
in
v
esti
g
ato
r
s
h
av
e
co
n
f
id
e
n
ce
in
th
e
leg
itima
cy
o
f
th
e
ev
id
en
ce
th
ey
o
b
tain
,
as
it
m
u
s
t
b
e
ad
m
is
s
ib
le
in
co
u
r
t.
T
o
p
r
ev
e
n
t
an
y
alter
atio
n
o
f
d
is
k
co
n
ten
ts
,
in
v
esti
g
ato
r
s
ca
n
im
p
lem
en
t
v
ar
io
u
s
d
ef
en
s
e
m
ec
h
a
n
is
m
s
,
s
u
ch
as:
Settin
g
a
h
ar
d
war
e
j
u
m
p
er
to
co
n
f
i
g
u
r
e
th
e
d
is
k
as
r
ea
d
-
o
n
ly
.
Usi
n
g
an
o
p
er
atin
g
s
y
s
tem
an
d
s
o
f
twar
e
th
at
ar
e
i
n
ca
p
ab
le
o
f
wr
itin
g
to
th
e
d
is
k
u
n
less
ex
p
licitly
in
s
tr
u
cted
t
o
d
o
s
o
.
E
m
p
lo
y
in
g
a
h
ar
d
d
is
k
wr
ite
b
lo
ck
t
o
o
l,
w
h
ich
p
r
o
v
id
es p
r
o
tectio
n
ag
ai
n
s
t a
n
y
attem
p
ts
to
wr
ite
to
th
e
d
is
k
.
Step
6
:
Acq
u
ir
e
n
o
n
-
v
o
latile
d
ata
n
o
n
-
v
o
latile
d
ata,
ty
p
ically
s
to
r
ed
o
n
h
ar
d
d
is
k
s
,
ca
n
b
e
ac
q
u
ir
e
d
th
r
o
u
g
h
b
o
th
liv
e
an
d
d
ea
d
ac
q
u
is
itio
n
p
r
o
ce
s
s
es.
Fo
r
li
v
e
ac
q
u
is
itio
n
,
in
v
esti
g
ato
r
s
m
ay
u
tili
ze
r
em
o
te
ac
q
u
is
itio
n
to
o
ls
lik
e
Netc
at
o
r
b
o
o
ta
b
le
C
Ds/
US
B
s
w
ith
to
o
ls
lik
e
C
AI
NE
to
ac
ce
s
s
th
e
h
ar
d
d
is
k
.
T
h
e
d
ea
d
ac
q
u
is
itio
n
p
r
o
ce
s
s
in
v
o
lv
es
t
h
e
f
o
llo
win
g
s
tep
s
:
R
em
o
v
e
th
e
h
ar
d
d
r
iv
e
f
r
o
m
th
e
s
u
s
p
ec
t
d
ev
ice.
C
o
n
n
ec
t
th
e
h
ar
d
d
r
iv
e
t
o
a
f
o
r
en
s
ic
wo
r
k
s
tatio
n
f
o
r
ac
q
u
is
itio
n
.
I
m
p
le
m
en
t
wr
ite
-
b
lo
c
k
in
g
o
n
t
h
e
h
ar
d
d
is
k
to
en
s
u
r
e
it
p
r
o
v
id
es
o
n
ly
r
ea
d
-
o
n
l
y
ac
ce
s
s
,
p
r
ev
en
ti
n
g
a
n
y
m
o
d
if
icatio
n
o
r
tam
p
e
r
in
g
o
f
its
co
n
ten
ts
.
Utilize
a
f
o
r
en
s
ic
ac
q
u
is
itio
n
to
o
l su
itab
le
f
o
r
co
llectin
g
th
e
r
eq
u
i
r
ed
d
ata.
Step
7
:
Plan
f
o
r
co
n
tin
g
en
c
y
i
n
d
ig
ital
f
o
r
en
s
ics
in
v
esti
g
atio
n
s
,
p
lan
n
in
g
f
o
r
co
n
tin
g
en
c
y
i
s
ess
en
tia
l
to
ad
d
r
ess
p
o
ten
tial
f
ailu
r
es
o
r
u
n
f
o
r
eseen
ev
en
ts
d
u
r
in
g
th
e
ac
q
u
is
itio
n
p
r
o
ce
s
s
.
T
h
is
in
v
o
lv
es
h
av
in
g
a
b
ac
k
u
p
p
la
n
in
p
lace
in
ca
s
e
h
ar
d
war
e
o
r
s
o
f
twar
e
m
al
f
u
n
cti
o
n
s
o
cc
u
r
.
C
o
n
tin
g
en
c
y
p
lan
n
in
g
is
cr
u
cial
in
all
cy
b
er
in
v
esti
g
atio
n
s
as
it
e
n
ab
les
in
v
esti
g
ato
r
s
t
o
p
r
ep
ar
e
f
o
r
u
n
ex
p
ec
ted
ci
r
cu
m
s
tan
ce
s
.
I
t
i
n
v
o
lv
es
d
ev
elo
p
in
g
s
tr
ateg
ies
to
m
itig
ate
r
is
k
s
an
d
en
s
u
r
e
th
e
co
m
p
letio
n
o
f
th
e
in
v
esti
g
atio
n
p
r
o
ce
s
s
ev
en
if
ce
r
t
ain
to
o
ls
o
r
s
y
s
tem
s
f
ail.
Fo
r
h
ar
d
d
is
k
d
ata
ac
q
u
is
itio
n
,
in
v
esti
g
ato
r
s
s
h
o
u
ld
cr
ea
te
at
least
two
im
ag
es
o
f
th
e
d
ig
ital
ev
id
e
n
ce
co
llected
.
T
h
is
r
ed
u
n
d
an
cy
h
elp
s
to
p
r
eser
v
e
th
e
in
teg
r
ity
o
f
th
e
ev
id
e
n
ce
.
I
n
th
e
ev
en
t
th
at
o
n
e
co
p
y
o
f
th
e
d
i
g
ital
ev
id
e
n
c
e
b
ec
o
m
es
co
r
r
u
p
ted
o
r
co
m
p
r
o
m
is
ed
,
i
n
v
esti
g
ato
r
s
ca
n
r
ely
o
n
th
e
b
ac
k
u
p
co
p
y
t
o
co
n
tin
u
e
th
eir
an
aly
s
i
s
an
d
en
s
u
r
e
th
e
in
te
g
r
ity
o
f
t
h
e
in
v
esti
g
atio
n
.
Fig
u
r
e
2
s
h
o
ws
Har
d
d
is
k
d
ata
ac
q
u
is
itio
n
.
W
h
en
y
o
u
h
av
e
ac
ce
s
s
to
m
u
ltip
le
im
ag
in
g
to
o
ls
lik
e
p
r
o
-
d
is
co
v
er
f
o
r
en
s
ics
o
r
Acc
ess
Data
FTK
I
m
ag
er
,
it
is
ad
v
is
ab
le
to
cr
ea
te
th
e
f
ir
s
t
im
ag
e
with
o
n
e
to
o
l
an
d
th
e
s
ec
o
n
d
im
a
g
e
with
an
o
th
er
to
o
l
.
T
h
is
ap
p
r
o
ac
h
h
elp
s
to
v
alid
ate
th
e
in
teg
r
ity
o
f
th
e
im
ag
i
n
g
p
r
o
c
ess
b
y
cr
o
s
s
-
v
er
if
y
in
g
th
e
r
es
u
lts
o
b
tain
ed
f
r
o
m
d
if
f
er
en
t
to
o
ls
.
Ho
wev
e
r
,
if
y
o
u
o
n
ly
h
av
e
ac
ce
s
s
to
o
n
e
i
m
ag
in
g
t
o
o
l,
it
i
s
s
till
cr
u
cial
to
cr
ea
te
m
u
ltip
le
im
ag
es
o
f
th
e
d
r
iv
e
u
s
in
g
th
e
s
am
e
to
o
l.
T
h
is
r
ed
u
n
d
an
c
y
e
n
s
u
r
es
th
at
y
o
u
h
av
e
b
ac
k
u
p
c
o
p
ies
o
f
th
e
d
ig
ital
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
0
8
8
-
8
7
0
8
I
n
t J E
lec
&
C
o
m
p
E
n
g
,
Vo
l.
15
,
No
.
4
,
Au
g
u
s
t
20
25
:
4
0
2
2
-
4030
4026
ev
id
en
ce
,
wh
ich
ca
n
b
e
in
v
alu
ab
le
in
ca
s
e
o
f
co
r
r
u
p
ti
o
n
o
r
o
th
er
is
s
u
es
with
o
n
e
o
f
t
h
e
im
a
g
es.
B
y
em
p
lo
y
in
g
m
u
ltip
le
im
ag
in
g
to
o
ls
f
o
r
cr
ea
tin
g
m
u
ltip
le
im
ag
es
with
th
e
s
am
e
to
o
l,
y
o
u
en
h
a
n
ce
th
e
r
eliab
ilit
y
an
d
in
teg
r
ity
o
f
th
e
f
o
r
e
n
s
ic
im
ag
in
g
p
r
o
ce
s
s
,
th
er
eb
y
s
tr
en
g
th
en
in
g
th
e
v
alid
ity
o
f
t
h
e
ev
i
d
en
ce
co
llected
f
o
r
an
aly
s
is
.
W
h
en
co
n
d
u
ctin
g
d
a
ta
ac
q
u
is
itio
n
,
it'
s
wo
r
th
c
o
n
s
i
d
er
in
g
th
e
u
s
e
o
f
h
a
r
d
war
e
ac
q
u
is
itio
n
to
o
ls
lik
e
UFED
Ultim
ate
o
r
I
M
SOLO
-
4
G3
I
T
R
UGGE
DI
Z
E
D.
T
h
ese
to
o
ls
o
f
f
er
ad
v
a
n
tag
es
s
u
ch
as
ac
ce
s
s
in
g
th
e
d
r
iv
e
at
th
e
B
I
OS
lev
el,
wh
ic
h
allo
ws
f
o
r
co
p
y
in
g
d
ata
f
r
o
m
th
e
h
o
s
t
p
r
o
tecte
d
ar
ea
(
H
PA)
.
Acc
ess
in
g
th
e
d
r
iv
e
at
th
e
B
I
OS
lev
el
p
r
o
v
i
d
es
a
d
ee
p
er
le
v
el
o
f
ac
c
ess
co
m
p
ar
ed
to
s
o
f
twar
e
-
b
ased
m
eth
o
d
s
,
en
ab
lin
g
th
e
ac
q
u
is
itio
n
o
f
d
ata
t
h
at
m
ay
b
e
h
id
d
en
o
r
p
r
o
tecte
d
with
in
t
h
e
HPA.
B
y
u
t
ilizin
g
h
ar
d
war
e
ac
q
u
is
itio
n
to
o
ls
,
s
h
o
wn
in
Fig
u
r
e
3
in
v
esti
g
ato
r
s
ca
n
en
s
u
r
e
co
m
p
r
eh
en
s
iv
e
d
ata
co
llectio
n
,
e
n
h
an
ci
n
g
t
h
e
th
o
r
o
u
g
h
n
ess
an
d
ac
cu
r
ac
y
o
f
th
e
f
o
r
en
s
ic
p
r
o
ce
s
s
.
Fig
u
r
e
2
.
Data
A
cq
u
is
itio
n
with
im
ag
in
g
to
o
ls
Fig
u
r
e
3
.
Data
A
cq
u
is
itio
n
with
h
ar
d
war
e
to
o
l
4.
RE
SU
L
T
S AN
D
D
I
SCU
SS
I
O
N
T
o
ex
tr
ac
t
v
o
latile
m
em
o
r
y
d
ata
f
r
o
m
a
W
in
d
o
ws
m
ac
h
in
e
,
f
o
r
e
n
s
ic
in
v
esti
g
ato
r
s
ca
n
u
t
ilize
to
o
ls
lik
e
B
elk
aso
f
t
L
iv
e
R
AM
C
a
p
tu
r
er
.
T
h
is
to
o
l
en
a
b
les
th
e
r
eliab
le
ex
tr
ac
tio
n
o
f
th
e
en
ti
r
e
co
n
ten
ts
o
f
th
e
co
m
p
u
ter
'
s
v
o
latile
m
em
o
r
y
,
ev
en
wh
en
p
r
o
tecte
d
b
y
a
c
tiv
e
an
ti
-
d
eb
u
g
g
in
g
o
r
an
ti
-
d
u
m
p
i
n
g
s
y
s
tem
s
.
B
elk
aso
f
t
L
iv
e
R
AM
C
ap
tu
r
er
s
av
es
th
e
ex
tr
ac
ted
d
ata
in
.
m
em
f
o
r
m
at,
f
ac
ilit
atin
g
f
u
r
th
e
r
an
aly
s
is
.
B
elk
aso
f
t
L
iv
e
R
AM
C
ap
tu
r
er
is
an
o
p
en
-
s
o
u
r
ce
f
o
r
en
s
ic
to
o
l,
en
s
u
r
in
g
tr
an
s
p
ar
e
n
cy
an
d
f
lex
ib
ilit
y
in
th
e
ac
q
u
i
s
itio
n
p
r
o
ce
s
s
.
T
h
e
t
o
o
l
ca
p
tu
r
es
th
e
en
tire
co
n
te
n
ts
o
f
v
o
latile
m
em
o
r
y
,
p
r
o
v
id
in
g
a
c
o
m
p
r
e
h
en
s
iv
e
s
n
ap
s
h
o
t
o
f
th
e
s
y
s
tem
'
s
s
tate
at
th
e
tim
e
o
f
ac
q
u
is
itio
n
.
B
elk
aso
f
t
L
iv
e
R
AM
C
ap
tu
r
er
is
co
m
p
atib
le
with
all
v
er
s
io
n
s
an
d
e
d
itio
n
s
o
f
W
in
d
o
ws,
in
clu
d
in
g
XP
,
Vis
ta,
W
in
d
o
ws
7
,
8
,
a
n
d
1
0
,
as
well
as
2
0
0
3
an
d
2
0
0
8
Ser
v
er
ed
itio
n
s
.
I
t
ca
n
b
y
p
ass
ac
tiv
e
an
ti
-
d
eb
u
g
g
in
g
o
r
an
ti
-
d
u
m
p
in
g
s
y
s
tem
s
,
en
s
u
r
in
g
s
u
cc
ess
f
u
l
ac
q
u
is
itio
n
ev
en
in
p
r
o
tecte
d
en
v
ir
o
n
m
e
n
ts
.
Sep
ar
ate
3
2
-
b
it
an
d
6
4
-
b
it
b
u
ild
s
ar
e
av
ailab
le,
m
in
im
izin
g
th
e
to
o
l'
s
f
o
o
tp
r
i
n
t
an
d
e
n
s
u
r
in
g
c
o
m
p
atib
ilit
y
with
d
if
f
er
en
t
s
y
s
tem
ar
ch
itectu
r
es.
Me
m
o
r
y
d
u
m
p
s
ca
p
tu
r
ed
with
B
elk
aso
f
t
L
iv
e
R
AM
C
ap
tu
r
er
ca
n
b
e
f
u
r
th
er
an
al
y
ze
d
u
s
in
g
to
o
ls
lik
e
B
elk
aso
f
t
E
v
id
en
ce
C
en
ter
s
o
f
twar
e,
f
ac
ilit
atin
g
in
-
d
ep
th
ex
a
m
in
atio
n
an
d
in
ter
p
r
etatio
n
o
f
th
e
ac
q
u
ir
ed
d
ata.
B
y
lev
er
a
g
in
g
B
e
lk
aso
f
t
L
iv
e
R
AM
C
ap
tu
r
er
,
f
o
r
en
s
ic
in
v
esti
g
ato
r
s
ca
n
ef
f
ec
tiv
ely
ac
q
u
ir
e
v
o
latile
m
em
o
r
y
d
ata
f
r
o
m
W
in
d
o
ws
m
ac
h
in
es,
en
h
an
cin
g
th
eir
ab
ilit
y
to
g
ath
er
cr
u
cial
ev
id
en
ce
f
o
r
f
o
r
en
s
ic
an
aly
s
is
.
Fig
u
r
e
4
r
ep
r
esen
ts
c
ap
tu
r
in
g
R
AM
o
f
a
m
ac
h
in
e.
W
h
ile
p
er
f
o
r
m
in
g
liv
e
ac
q
u
is
itio
n
,
an
in
v
esti
g
ato
r
m
u
s
t b
e
awa
r
e
o
f
th
e
f
ac
t th
a
t w
o
r
k
in
g
o
n
a
liv
e
s
y
s
tem
m
ay
alter
th
e
co
n
ten
ts
o
f
R
AM
o
r
p
r
o
ce
s
s
es r
u
n
n
in
g
o
n
th
e
s
y
s
tem
.
An
y
in
v
o
lu
n
tar
y
ac
tio
n
p
er
f
o
r
m
e
d
o
n
th
e
s
y
s
te
m
m
ay
p
o
ten
tially
m
ak
e
th
e
s
y
s
tem
in
ac
ce
s
s
ib
le.
Acc
ess
Data
FTK
I
m
ag
er
is
a
p
o
wer
f
u
l
to
o
l
u
s
ed
b
y
f
o
r
e
n
s
ic
p
r
o
f
ess
io
n
als
to
p
r
ev
iew,
ac
q
u
ir
e,
an
d
im
ag
e
co
m
p
u
ter
d
ata
wh
ile
m
ain
tain
in
g
th
e
in
teg
r
ity
o
f
t
h
e
o
r
ig
i
n
al
ev
id
e
n
ce
.
I
ts
co
m
p
r
eh
en
s
iv
e
f
ea
tu
r
es
m
ak
e
i
t
an
ess
en
tial
co
m
p
o
n
en
t
o
f
d
ig
ital
f
o
r
e
n
s
ics
in
v
esti
g
atio
n
s
.
Fig
u
r
e
5
s
h
o
w
s
elec
tin
g
d
esti
n
atio
n
d
ir
ec
to
r
y
to
s
to
r
e
im
a
g
e
f
ile
an
d
Fig
u
r
e
6
s
h
o
ws
th
at
im
ag
e
is
cr
ea
ted
s
u
cc
ess
f
u
lly
.
Valid
a
te
d
ata
Acq
u
is
itio
n
–
W
in
d
o
ws
v
alid
atio
n
m
eth
o
d
s
.
I
n
W
in
d
o
ws
en
v
ir
o
n
m
en
t
s
,
th
er
e
ar
e
s
ev
er
al
m
eth
o
d
s
f
o
r
v
alid
atin
g
d
ata
ac
q
u
is
itio
n
to
en
s
u
r
e
th
e
in
teg
r
ity
o
f
ev
id
en
ce
:
W
in
d
o
ws
in
clu
d
es
Po
wer
Sh
ell,
wh
ich
o
f
f
er
s
th
e
Get
-
Fi
leHa
s
h
cm
d
let.
T
h
is
cm
d
let
co
m
p
u
t
es
th
e
h
ash
v
alu
e
o
f
a
n
ev
id
en
ce
f
ile
u
s
in
g
a
s
p
ec
if
ied
h
ash
al
g
o
r
it
h
m
.
I
n
v
esti
g
ato
r
s
ca
n
u
s
e
th
is
h
ash
v
alu
e
th
r
o
u
g
h
o
u
t
th
e
in
v
est
ig
atio
n
to
v
alid
ate
th
e
in
teg
r
it
y
o
f
th
e
ev
id
e
n
ce
.
Ma
n
y
c
o
m
m
er
cial
co
m
p
u
ter
f
o
r
en
s
ics
p
r
o
g
r
am
s
c
o
m
e
with
b
u
ilt
-
in
v
alid
atio
n
f
ea
tu
r
es.
T
h
ese
f
ea
tu
r
es
allo
w
in
v
esti
g
ato
r
s
to
v
alid
ate
ev
id
en
ce
f
i
les
d
ir
ec
tly
with
in
th
e
f
o
r
en
s
ic
s
o
f
twar
e.
B
y
co
m
p
ar
in
g
h
ash
v
alu
es
o
r
o
th
er
m
etad
ata,
i
n
v
esti
g
ato
r
s
ca
n
co
n
f
ir
m
th
e
in
teg
r
ity
o
f
th
e
ac
q
u
ir
e
d
d
ata.
Pro
Dis
co
v
er
g
en
er
ates
.
ev
e
f
iles
co
n
tain
in
g
m
etad
ata,
in
cl
u
d
in
g
h
ash
v
alu
es,
f
o
r
s
eg
m
en
te
d
f
iles
o
r
ac
q
u
is
itio
n
f
iles
.
W
h
en
lo
ad
in
g
an
im
ag
e
in
to
Pro
Dis
co
v
er
,
th
e
to
o
l c
o
m
p
ar
es th
e
h
ash
v
alu
e
o
f
t
h
e
im
ag
e
to
th
e
h
ash
v
alu
e
o
f
th
e
o
r
ig
in
al
m
ed
ia.
I
f
th
e
h
ash
es
d
o
n
o
t
m
atch
,
Pro
Dis
co
v
er
n
o
tifie
s
th
e
u
s
er
th
at
th
e
im
ag
e
m
ay
b
e
co
r
r
u
p
t,
in
d
icatin
g
th
at
th
e
ev
id
en
c
e
m
ay
n
o
t
b
e
r
eliab
le.
B
y
lev
er
ag
in
g
th
ese
v
alid
atio
n
m
eth
o
d
s
,
f
o
r
en
s
ic
in
v
esti
g
ato
r
s
ca
n
en
s
u
r
e
th
e
in
teg
r
ity
an
d
r
eliab
ilit
y
o
f
th
e
ac
q
u
ir
ed
e
v
id
en
ce
,
s
tr
en
g
th
en
in
g
th
e
v
ali
d
ity
o
f
th
eir
f
i
n
d
in
g
s
d
u
r
in
g
leg
al
p
r
o
ce
ed
in
g
s
.
I
n
Fig
u
r
e
7
we
c
an
s
ee
th
at
h
ash
v
alu
e
is
co
m
p
u
ted
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
t J E
lec
&
C
o
m
p
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n
g
I
SS
N:
2088
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8
7
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N
a
vig
a
tin
g
cy
b
er in
ve
s
tig
a
tio
n
s
:
s
tr
a
teg
ies a
n
d
to
o
ls
fo
r
fo
r
en
s
ic
d
a
ta
…
(
S
r
in
iva
s
K
a
n
a
k
a
la
)
4027
Fig
u
r
e
4
.
C
ap
tu
r
i
n
g
R
AM
o
f
a
m
ac
h
in
e
Fig
u
r
e
5
.
Selectin
g
d
esti
n
atio
n
d
ir
ec
to
r
y
Fig
u
r
e
6
.
I
m
ag
e
cr
ea
te
d
s
u
cc
e
s
s
f
u
lly
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
0
8
8
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8
7
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I
n
t J E
lec
&
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m
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g
,
Vo
l.
15
,
No
.
4
,
Au
g
u
s
t
20
25
:
4
0
2
2
-
4030
4028
Fig
u
r
e
7
.
C
o
m
p
u
tin
g
h
ash
v
al
u
e
5.
CO
NCLU
SI
O
N
T
h
e
cu
lm
in
atio
n
o
f
o
u
r
d
is
cu
s
s
io
n
o
n
f
o
r
en
s
ic
d
ata
ac
q
u
is
itio
n
r
ef
lects
a
n
u
an
ce
d
u
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ch
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t
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m
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ata
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r
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o
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th
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o
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if
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t L
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ata
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n
d
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is
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ce
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g
s
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d
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s
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io
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n
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er
s
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r
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e
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itical
im
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o
r
tan
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o
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m
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g
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ath
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g
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f
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p
h
o
ld
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n
g
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d
p
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u
r
a
l
s
tan
d
ar
d
s
.
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m
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th
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s
ig
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ts
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lean
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d
f
r
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m
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r
d
is
co
u
r
s
e,
f
o
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e
n
s
ic
p
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ctitio
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er
s
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o
n
d
u
ct
t
h
o
r
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g
h
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d
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ig
ital
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v
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s
am
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s
t
th
e
ev
o
lv
in
g
lan
d
s
ca
p
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o
f
cy
b
e
r
th
r
ea
ts
.
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o
o
k
in
g
ah
e
ad
,
s
ev
er
al
av
en
u
es
f
o
r
f
u
tu
r
e
wo
r
k
p
r
esen
t
th
e
m
s
elv
es
in
th
e
r
ea
lm
o
f
f
o
r
en
s
ic
d
ata
ac
q
u
is
itio
n
.
C
o
n
tin
u
ed
r
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in
em
e
n
t
an
d
d
ev
elo
p
m
e
n
t
o
f
f
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en
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ic
ac
q
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is
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to
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ls
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en
h
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ce
th
eir
ca
p
ab
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an
d
ad
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p
tab
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to
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o
lv
in
g
tech
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o
lo
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an
d
f
o
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en
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ch
allen
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im
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p
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tem
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an
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F
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4029
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DATA AV
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Der
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RE
F
E
R
E
NC
E
S
[
1
]
M
.
D
.
K
o
h
n
,
M
.
M
.
El
o
f
f
,
a
n
d
J.
H
.
P
.
E
l
o
f
f
,
“
I
n
t
e
g
r
a
t
e
d
d
i
g
i
t
a
l
f
o
r
e
n
s
i
c
p
r
o
c
e
ss
m
o
d
e
l
,
”
C
o
m
p
u
t
e
rs
&
S
e
c
u
ri
t
y
,
v
o
l
.
3
8
,
p
p
.
1
0
3
–
1
1
5
,
O
c
t
.
2
0
1
3
,
d
o
i
:
1
0
.
1
0
1
6
/
j
.
c
o
se.
2
0
1
3
.
0
5
.
0
0
1
.
[
2
]
E.
C
a
se
y
a
n
d
C
.
W
.
R
o
se
,
“
F
o
r
e
n
si
c
a
n
a
l
y
s
i
s,
”
i
n
H
a
n
d
b
o
o
k
o
f
d
i
g
i
t
a
l
f
o
r
e
n
si
c
s a
n
d
i
n
v
e
s
t
i
g
a
t
i
o
n
,
A
c
a
d
e
m
i
c
P
r
e
s
s,
2
0
1
0
,
p
p
.
2
1
–
6
2
.
[
3
]
M
.
G
e
n
g
e
n
b
a
c
h
,
A
.
C
h
a
ss
a
n
o
f
f
,
a
n
d
P
.
O
l
se
n
,
“
I
n
t
e
g
r
a
t
i
n
g
d
i
g
i
t
a
l
f
o
r
e
n
s
i
c
s
i
n
t
o
b
o
r
n
-
d
i
g
i
t
a
l
w
o
r
k
f
l
o
w
s:
Th
e
B
i
t
C
u
r
a
t
o
r
p
r
o
j
e
c
t
,
”
Pro
c
e
e
d
i
n
g
s
o
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e
AS
I
S
T
A
n
n
u
a
l
M
e
e
t
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g
,
v
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l
.
4
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.
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–
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,
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:
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/
m
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t
.
1
4
5
0
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9
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4
3
.
[
4
]
E.
H
u
e
b
n
e
r
,
D
.
B
e
m,
F
.
H
e
n
sk
e
n
s
,
a
n
d
M
.
W
a
l
l
i
s
,
“
P
e
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si
st
e
n
t
s
y
st
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ms
t
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h
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q
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s
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n
f
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si
c
a
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q
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s
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t
i
o
n
o
f
memo
r
y
,
”
D
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g
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I
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s
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g
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t
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o
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.
3
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p
.
1
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.
d
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.
2
0
0
8
.
0
2
.
0
0
1
.
[
5
]
B
.
E
.
D
a
l
r
y
m
p
l
e
a
n
d
E.
J
.
S
m
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t
h
,
Fo
r
e
n
si
c
d
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g
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t
a
l
i
m
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g
e
p
r
o
c
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ssi
n
g
.
B
o
c
a
R
a
t
o
n
,
F
L
:
C
R
C
P
r
e
ss,
[
2
0
1
8
]
:
C
R
C
P
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ss,
2
0
1
8
.
[
6
]
O
.
I
.
A
b
i
o
d
u
n
,
M
.
A
l
a
w
i
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a
,
A
.
E.
O
mo
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a
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a
,
a
n
d
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.
A
l
a
b
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t
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f
,
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a
t
a
p
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v
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n
a
n
c
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f
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c
l
o
u
d
f
o
r
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n
si
c
i
n
v
e
st
i
g
a
t
i
o
n
s,
s
e
c
u
r
i
t
y
,
c
h
a
l
l
e
n
g
e
s,
s
o
l
u
t
i
o
n
s
a
n
d
f
u
t
u
r
e
p
e
r
sp
e
c
t
i
v
e
s:
A
su
r
v
e
y
,
”
J
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