T
E
L
K
O
M
NIKA
T
elec
o
mm
un
ica
t
io
n,
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m
pu
t
ing
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lect
ro
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nd
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ntr
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l
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l.
1
8
,
No
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4
,
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g
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s
t
2020
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p
p
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SS
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ac
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ed
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First Gr
ad
e
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y
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m
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ee
No
: 2
1
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/2
0
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8
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: 1
0
.
1
2
9
2
8
/
T
E
L
KOM
NI
KA
.
v
1
8
i
4
.
1
4
2
1
6
2012
J
o
ur
na
l ho
m
ep
a
g
e
:
h
ttp
:
//jo
u
r
n
a
l.u
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d
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Encry
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nteger w
a
v
elet
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m
a
nd ha
nd geo
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et
ry
Z
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ena
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Al
-
K
a
t
ee
b
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Sa
j
a
J
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M
o
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m
e
d
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a
rtme
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m
p
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ter S
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ien
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e
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ll
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m
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M
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s,
Un
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nfo
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ticle
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y:
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t
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s
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re
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l
o
f
c
las
s
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ti
o
n
a
n
d
u
n
w
a
v
e
rin
g
q
u
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li
ty
b
e
c
a
u
se
th
e
p
ro
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e
d
u
re
h
a
s
n
u
m
e
ro
u
s
q
u
a
li
ti
e
s
a
n
d
p
o
i
n
ts
o
f
in
tere
st.
T
h
e
o
f
f
e
re
d
a
lg
o
rit
h
m
u
ti
li
z
e
d
m
a
n
y
p
ro
p
e
rti
e
s
o
f
h
a
n
d
g
e
o
m
e
tr
y
e
sti
m
a
ti
o
n
s
a
s
k
e
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s
to
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n
c
o
d
e
a
n
d
d
e
c
o
d
e
th
e
a
u
d
i
o
f
il
e
.
M
a
n
y
te
sts
w
e
re
c
a
rried
o
u
t
o
n
a
se
t
o
f
a
u
d
io
f
il
e
s
a
n
d
q
u
a
li
ty
m
e
tri
c
s
su
c
h
a
s
m
e
a
n
sq
u
a
re
e
rro
r
a
n
d
c
o
rre
latio
n
s
w
e
re
c
a
lcu
late
d
w
h
ich
in
t
u
rn
c
o
n
f
irm
e
d
th
e
e
f
f
icie
n
c
y
a
n
d
q
u
a
li
ty
o
f
th
e
w
o
rk
.
K
ey
w
o
r
d
s
:
An
au
d
io
f
ile
D
ec
r
y
p
tio
n
E
n
cr
y
p
tio
n
,
H
an
d
g
eo
m
e
tr
y
I
n
teg
er
w
a
v
elet
tr
an
s
f
o
r
m
atio
n
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
:
Z
ee
n
a
N.
Al
-
K
atee
b
,
Dep
ar
t
m
en
t o
f
C
o
m
p
u
ter
Scie
n
ce
,
C
o
lleg
e
o
f
C
o
m
p
u
ter
Scie
n
ce
an
d
Ma
th
e
m
atic
s
,
Un
i
v
er
s
it
y
o
f
Mo
s
u
l,
Mo
s
u
l,
I
r
aq
.
E
m
ail:
ze
e
n
aa
lk
a
teeb
@
y
ah
o
o
.
co
m
,
ze
e
n
aa
l
k
atee
b
@
u
o
m
o
s
u
l
.
ed
u
.
iq
1.
I
NT
RO
D
UCT
I
O
N
Data
en
cr
y
p
tio
n
h
a
s
a
g
r
ea
t
i
m
p
o
r
ta
n
ce
to
p
r
eser
v
e
th
e
r
ea
l
in
f
o
r
m
atio
n
f
r
o
m
d
etec
t
io
n
an
d
f
o
r
g
er
y
an
d
w
o
r
k
s
o
n
it
s
n
o
n
-
v
is
ib
ili
t
y
in
al
l o
f
its
t
y
p
es.
I
t
co
n
s
id
er
ed
a
co
n
tr
ib
u
ti
n
g
f
ac
to
r
in
ad
d
i
n
g
m
o
r
e
p
r
o
tectio
n
ag
ain
s
t
r
ea
d
in
g
,
h
ea
r
i
n
g
,
ta
m
p
er
in
g
o
r
d
estru
ctio
n
.
T
h
e
tech
n
iq
u
es
u
s
ed
to
en
co
d
e
th
e
i
n
f
o
r
m
atio
n
ar
e
d
i
f
f
er
ed
,
also
th
eir
m
et
h
o
d
s
ev
o
lv
ed
to
r
ea
ch
as
w
h
ic
h
it
i
s
cu
r
r
en
t
l
y
.
B
ec
au
s
e
o
f
th
e
e
x
tr
ao
r
d
in
ar
y
i
m
p
r
o
v
e
m
en
t
a
n
d
t
h
e
elec
tr
o
n
ic
u
p
r
is
i
n
g
,
t
h
e
co
n
ce
p
t
o
f
b
io
m
etr
ic
in
f
o
r
m
a
tio
n
t
h
en
it
w
a
s
in
tr
o
d
u
ce
d
in
to
s
e
cr
et
d
ata
en
cr
y
p
tio
n
s
y
s
te
m
s
h
a
s
e
m
er
g
ed
.
T
h
is
led
to
d
ev
elo
p
in
g
th
e
co
n
ce
p
t o
f
b
io
-
en
cr
y
p
tio
n
s
y
s
te
m
s
.
C
r
y
p
to
g
r
ap
h
y
is
t
h
e
ab
ilit
y
an
d
s
tu
d
y
o
f
k
ee
p
i
n
g
s
ig
n
i
f
ica
n
t
d
at
a
f
r
o
m
d
is
t
u
r
b
er
an
d
h
ac
k
e
r
s
w
h
o
tr
y
to
u
tili
ze
th
e
m
f
o
r
f
o
r
b
id
d
en
u
s
a
g
e.
W
h
at's
m
o
r
e,
it
m
i
g
h
t
b
e
ch
ar
ac
ter
ized
as
a
p
r
o
ce
d
u
r
e
th
at
g
u
ar
an
tee
s
th
e
p
r
o
tectio
n
o
f
th
e
co
r
r
esp
o
n
d
en
ce
b
et
w
ee
n
th
e
t
w
o
g
at
h
er
i
n
g
s
[
1
,
2
]
.
I
t
ch
ief
l
y
i
n
clu
d
es
t
w
o
p
ar
ts
:
en
cr
y
p
tio
n
an
d
d
ec
r
y
p
tio
n
.
E
n
cr
y
p
tio
n
m
an
a
g
e
s
m
i
x
ed
th
e
s
u
b
s
ta
n
c
e
o
f
a
s
af
e
m
e
s
s
a
g
e
to
m
a
k
e
it
d
is
j
o
in
ted
o
r
u
n
d
ec
ip
h
er
ab
le
f
o
r
an
y
u
n
ap
p
r
o
v
ed
in
d
iv
id
u
al
o
r
p
r
o
g
r
am
.
W
h
er
e
d
ec
r
y
p
tio
n
i
s
a
p
r
o
ce
s
s
o
f
co
n
v
er
tin
g
th
e
en
cr
y
p
ted
m
es
s
ag
e
to
it
s
i
d
en
tical
p
lain
t
e
x
t [
3
,
4
]
.
T
h
e
w
a
v
elet
s
p
ac
e
is
g
r
o
w
in
g
u
p
r
ap
id
l
y
.
W
av
elet
s
h
av
e
b
ee
n
ad
eq
u
atel
y
u
s
ed
as
an
a
m
az
i
n
g
ass
e
t
i
n
n
u
m
er
o
u
s
v
ar
io
u
s
f
ield
s
s
u
c
h
as
s
ig
n
al
p
r
o
ce
s
s
i
n
g
,
s
tar
watc
h
i
n
g
,
a
n
d
cr
y
p
to
g
r
ap
h
y
[
5
]
.
I
n
teg
er
w
av
ele
t
tr
an
s
f
o
r
m
i
s
a
k
i
n
d
o
f
w
a
v
elet
tr
an
s
f
o
r
m
t
h
at
m
ap
in
te
g
er
d
at
a
s
et
w
it
h
an
o
t
h
er
in
teg
er
d
ata
s
et,
th
e
s
i
g
n
i
f
ica
n
t
p
r
o
p
er
ty
o
f
t
h
e
i
n
te
g
er
w
av
el
et
tr
an
s
f
o
r
m
(
I
W
T
)
its
co
ef
f
ic
ien
ts
h
a
v
e
a
s
i
m
ilar
d
y
n
a
m
ica
l
r
an
g
e
a
s
t
h
e
f
ir
s
t
s
ig
n
.
T
h
is
m
ak
e
s
s
i
m
p
ler
u
s
ag
e
co
n
te
m
p
latio
n
s
i
n
r
eg
ar
d
s
to
th
e
s
ize
o
f
t
h
e
f
ac
to
r
s
to
b
e
u
til
ized
an
d
th
e
r
ea
ch
e
s
to
ac
co
m
m
o
d
ate
in
t
h
e
co
d
in
g
ca
lcu
latio
n
[
6
]
.
Evaluation Warning : The document was created with Spire.PDF for Python.
T
E
L
KOM
NI
K
A
T
elec
o
m
m
u
n
C
o
m
p
u
t E
l
C
o
n
tr
o
l
E
n
cryp
tin
g
a
n
a
u
d
io
file b
a
s
e
d
o
n
in
te
g
er w
a
ve
let
tr
a
n
s
fo
r
m
a
n
d
h
a
n
d
g
eo
ma
tr
y
(
Zeen
a
N
.
A
l
-
K
a
teeb
)
2013
Ma
n
y
en
cr
y
p
tio
n
m
et
h
o
d
s
h
a
v
e
ap
p
ea
r
ed
an
d
m
a
n
y
r
es
ea
r
ch
er
s
h
av
e
tr
ied
to
d
ev
elo
p
n
e
w
,
m
o
d
er
n
an
d
n
o
v
el
w
a
y
s
to
en
cr
y
p
t
co
n
f
id
en
t
ial
d
ata,
s
u
c
h
as
[
7
]
,
th
e
y
u
s
ed
th
e
R
S
A
alg
o
r
it
h
m
i
n
a
n
e
w
w
a
y
to
en
cr
y
p
t
an
d
d
ec
r
y
p
t a
u
d
io
f
iles
,
in
o
r
d
er
to
p
r
o
tect
its
co
n
f
id
en
tial d
ata.
I
n
[
8
]
a
v
o
ice
en
cr
y
p
tio
n
f
r
a
m
e
w
o
r
k
is
cr
ea
ted
as
a
r
ea
l
-
ti
m
e
s
o
f
t
w
ar
e
ap
p
lic
atio
n
u
s
i
n
g
ad
v
an
ce
d
e
n
cr
y
p
ti
o
n
s
ta
n
d
ar
d
s
(
A
E
S)
to
p
er
f
o
r
m
t
h
is
cr
y
p
to
g
r
ap
h
y
.
W
h
er
e
[
9
]
p
r
esen
ted
an
ap
p
licatio
n
to
en
cr
y
p
t
au
d
io
a
n
d
s
ter
eo
d
ata
s
a
m
p
les
u
s
in
g
s
in
g
le
a
n
d
d
o
u
b
le
d
i
m
e
n
s
io
n
d
is
cr
ete
-
ti
m
e
c
h
ao
tic
s
y
s
te
m
s
w
er
e.
T
o
en
h
a
n
ce
s
ec
u
r
it
y
d
u
r
in
g
en
cr
y
p
tio
n
.
[
1
0
]
g
i
v
es
a
co
m
p
lete
p
r
ese
n
tatio
n
ab
o
u
t
s
o
m
e
o
f
t
h
e
e
x
i
s
ti
n
g
cr
y
p
to
g
r
ap
h
ic
tech
n
iq
u
es
a
n
d
t
h
ei
r
p
er
f
o
r
m
a
n
ce
f
o
r
all
d
ata
t
y
p
e
s
ch
ief
l
y
a
u
d
io
f
iles
.
So
m
e
r
esear
ch
er
s
h
a
v
e
atte
m
p
ted
to
d
ec
r
ea
s
e
au
d
io
en
cr
y
p
tio
n
ti
m
e
b
y
ch
o
o
s
i
n
g
p
ar
ts
o
f
th
e
au
d
io
f
ile
ca
r
e
f
u
ll
y
[
1
1
-
1
3
]
,
w
h
er
e
i
n
[
1
1
]
th
e
au
d
io
f
ile
s
e
n
cr
y
p
t
ed
u
s
i
n
g
t
h
e
d
is
c
r
ete
f
o
u
r
ier
t
r
an
s
f
o
r
m
(
DFT
)
to
en
cr
y
p
t lo
w
er
f
r
eq
u
e
n
c
y
b
an
d
s
,
an
d
s
o
m
e
r
esear
ch
er
s
p
er
f
o
r
m
en
co
d
in
g
b
y
e
m
p
lo
y
i
n
g
a
s
h
u
f
f
le
s
tr
ea
m
cip
h
er
[
1
4
]
.
I
n
[
1
5
]
th
e
r
esear
ch
er
s
tr
y
to
u
s
e
b
lo
ck
cip
h
er
e
n
cr
y
p
tio
n
s
y
s
te
m
w
it
h
(
.
w
av
)
f
ile.
T
h
e
y
m
i
x
b
lo
ck
cip
h
er
s
an
d
c
h
ao
tic
s
y
s
te
m
s
to
en
cr
y
p
t
s
p
ee
ch
f
ile
(
.
w
a
v
)
u
s
i
n
g
t
w
o
o
f
b
lo
ck
cip
h
er
m
o
d
es
(
C
B
C
,
C
F
B
)
.
Oth
er
s
cien
tis
t
s
u
tili
ze
d
c
h
ao
tic
m
ap
s
,
[
1
6
]
u
s
ed
d
eo
x
y
r
ib
o
n
u
cleic
ac
id
(
DN
A
)
en
cr
y
p
t
in
g
r
u
les
an
d
h
y
b
r
id
c
h
ao
tic
s
h
i
f
t
tr
an
s
f
o
r
m
(
HC
ST
)
to
p
er
f
o
r
m
a
n
o
v
el
au
d
io
cr
y
p
t
o
s
y
s
te
m
.
Nis
h
ith
S
in
h
a,
et
al.
E
m
b
ed
d
in
g
e
n
co
d
ed
d
ata
in
th
e
a
u
d
io
f
i
les,
w
h
er
e
t
h
e
o
r
ig
i
n
al
te
x
t
m
e
s
s
a
g
e
e
n
co
d
ed
b
y
u
p
d
atin
g
V
ig
e
n
èr
e
cip
h
er
,
a
n
d
u
s
in
g
L
SB
e
n
co
d
in
g
to
h
id
e
it
in
to
th
e
co
v
er
au
d
io
,
n
ex
t,
ex
p
o
s
ed
th
e
au
d
io
f
ile
to
t
r
an
s
p
o
s
itio
n
u
t
ilizi
n
g
o
f
B
lu
m
B
lu
m
S
h
u
b
p
s
eu
d
o
-
r
an
d
o
m
n
u
m
b
er
g
e
n
er
ato
r
[
1
7
]
.
2.
U
T
I
L
I
Z
I
N
G
B
I
O
M
E
T
RI
C
T
E
CH
NO
L
O
G
I
E
S
A
s
o
f
l
at
e
,
a
n
e
w
s
ci
en
c
e
(
o
r
t
er
m
)
is
a
p
p
e
a
r
e
d
,
it
is
a
c
o
n
c
e
p
t
o
f
b
i
o
m
e
t
r
i
c
s
"Bi
o
m
e
t
r
i
c
t
e
ch
n
o
l
o
g
i
es
".
I
t
is
d
ef
in
e
d
a
s
a
p
r
o
g
r
am
m
ed
s
t
r
at
eg
i
es
f
o
r
v
e
r
i
f
y
in
g
/
o
r
r
e
c
o
g
n
i
zi
n
g
.
B
i
o
m
e
t
r
ic
te
c
h
n
o
lo
g
i
es
h
av
e
g
r
o
w
n
a
n
d
u
s
e
d
i
n
d
i
f
f
e
r
e
n
t
a
r
e
as
o
f
l
if
e
,
th
e
p
e
r
s
o
n
a
l
ity
o
f
a
l
iv
in
g
in
d
i
v
i
d
u
a
l
d
e
p
en
d
s
o
n
tw
o
ty
p
es
[
1
8
,
1
9
]
:
-
B
eh
av
io
r
al
b
io
m
etr
ics:
I
t
ca
n
b
e
d
ef
in
ed
as
a
s
ca
le
o
f
h
u
m
a
n
ac
tio
n
s
s
u
c
h
as
g
ai
t,
s
ig
n
at
u
r
e.
B
eh
av
io
r
al
b
io
m
etr
ic
s
,
m
ea
s
u
r
e
h
u
m
a
n
elec
tr
o
ca
r
d
io
g
r
am
s
also
s
u
ch
as
(
E
C
G)
s
ig
n
als
w
h
ich
ca
n
e
m
p
lo
y
i
n
p
er
s
o
n
ali
t
y
r
ec
o
g
n
itio
n
an
d
au
t
h
e
n
ticatio
n
-
P
h
y
s
io
lo
g
ical
b
io
m
etr
ic
s
:
I
t
c
an
b
e
u
s
ed
to
d
is
ti
n
g
u
is
h
i
n
d
i
v
id
u
al,
f
r
o
m
o
n
e
to
o
t
h
er
s
,
d
e
p
en
d
in
g
o
n
ar
e
th
e
i
n
d
iv
id
u
al
p
h
y
s
ical
p
r
o
p
er
ties
o
f
s
u
c
h
as
h
a
n
d
g
eo
m
etr
y
,
f
in
g
er
p
r
in
t,
o
d
o
r
,
h
an
d
v
ein
,
ea
r
,
ir
is
,
p
alm
p
r
in
t,
r
etin
a,
f
ac
e,
v
o
ice,
in
f
r
ar
ed
th
er
m
o
g
r
a
m
an
d
DN
A
.
B
i
o
m
e
t
r
i
c
t
e
ch
n
o
l
o
g
i
es
m
u
s
t
m
e
e
t
th
e
p
r
e
d
e
t
e
r
m
in
e
d
n
ec
e
s
s
it
ie
s
t
o
b
e
u
s
ef
u
l
an
d
d
e
p
e
n
d
a
b
le
[
2
0
,
2
1
]
:
U
n
i
q
u
en
ess
:
T
h
e
r
e
a
r
e
n
o
t
w
o
p
e
o
p
l
e
w
h
o
c
an
h
av
e
t
h
i
s
p
r
o
p
e
r
ty
i
d
e
n
t
i
c
al
ly
,
A
v
ai
l
a
b
il
i
ty
:
I
t
m
e
an
s
,
th
a
t
ev
er
y
o
n
e
h
a
s
th
i
s
ch
a
r
ac
t
e
r
is
ti
c
o
r
p
r
o
p
e
r
ty
,
Pe
r
m
an
en
c
e
:
I
t
m
ea
n
s
,
th
is
ch
ar
a
c
t
e
r
is
t
i
c
i
s
s
t
a
b
l
e
an
d
d
o
e
s
n
o
t
c
h
an
g
e
b
y
t
im
e’
s
f
a
c
t
o
r
s
o
r
t
h
at
i
t
is
s
l
ig
h
t
l
y
a
f
f
e
ct
e
d
b
y
t
h
e
t
im
e’
s
f
a
c
t
o
r
s
,
th
en
th
e
tem
p
l
a
t
e
s
h
o
u
l
d
b
e
u
p
d
a
t
e
d
p
e
r
i
o
d
i
c
a
lly
,
C
o
l
l
ec
t
a
b
i
li
ty
:
I
t
m
e
an
s
t
h
e
a
d
je
c
t
iv
e
c
an
b
e
q
u
an
t
if
i
e
d
b
y
el
ec
t
r
o
n
ic
s
en
s
o
r
s
e
as
ily
,
Pe
r
f
o
r
m
an
ce
:
th
a
t
m
e
an
s
th
e
u
s
e
o
f
c
h
a
r
a
ct
e
r
is
t
ic
g
iv
es
a
c
cu
r
a
te
r
e
s
u
l
t
s
a
t
a
g
o
o
d
s
p
e
e
d
o
f
d
i
s
t
in
c
ti
o
n
,
an
d
t
h
at
t
h
e
m
at
e
r
i
al
r
e
s
o
u
r
c
es
t
o
u
s
e
th
a
t
a
t
t
r
i
b
u
t
e
a
r
e
av
a
il
a
b
l
e
,
A
c
c
e
p
t
a
b
il
i
ty
:
I
t
m
e
an
s
th
e
c
o
l
le
c
t
i
o
n
o
f
th
i
s
p
r
o
p
e
r
ty
is
a
c
c
e
p
te
d
b
y
th
e
p
u
b
li
c
an
d
d
o
e
s
n
o
t
m
e
et
o
b
je
c
t
i
o
n
s
,
R
es
i
s
t
an
c
e
t
o
C
i
r
cu
m
v
en
t:
I
t
m
e
a
n
s
th
e
te
ch
n
o
l
o
g
y
c
an
r
es
is
t
th
e
f
r
au
d
t
a
ct
i
cs
th
a
t
h
a
ck
e
r
s
c
an
u
s
e
[
2
0
-
2
2
]
.
B
io
m
etr
ic
e
n
cr
y
p
tio
n
s
y
s
te
m
s
ar
e
an
i
m
p
o
r
tan
t
ap
p
licatio
n
o
f
b
io
m
etr
ic
tec
h
n
o
lo
g
ies,
I
t
co
m
b
i
n
s
th
e
b
en
ef
its
o
f
en
cr
y
p
tio
n
an
d
b
io
m
etr
ic
s
f
o
r
ex
p
lo
itin
g
th
e
a
d
v
an
ta
g
es o
f
b
o
th
[
2
3
]
.
E
n
cr
y
p
tio
n
p
r
o
v
id
es h
ig
h
lev
els
o
f
s
ec
u
r
it
y
,
as
w
ell
as
p
r
o
v
id
s
b
io
m
etr
ic
s
w
it
h
a
n
o
n
-
d
is
clai
m
er
f
ea
t
u
r
e.
A
ll
o
f
t
h
e
s
e
th
i
n
g
s
s
av
e
s
o
u
r
ef
f
o
r
t
s
to
p
r
o
tect
th
e
s
y
m
b
o
ls
an
d
s
a
v
es
u
s
f
r
o
m
f
o
r
g
e
tti
n
g
p
ass
w
o
r
d
s
p
r
o
b
le
m
s
.
I
n
b
io
m
etr
ic
cr
y
p
to
s
y
s
te
m
s
,
a
cr
y
p
to
g
r
ap
h
ic
k
e
y
is
cr
ea
ted
f
r
o
m
t
h
e
b
io
m
etr
ic
te
m
p
late
f
o
r
a
clien
t
k
ep
t
i
n
t
h
e
d
atab
ase
s
o
th
at
t
h
e
k
e
y
ca
n
't
b
e
f
o
u
n
d
w
ith
o
u
t
a
f
r
u
i
tf
u
l
b
i
o
m
e
tr
ic
v
al
id
atio
n
[
1
9
,
2
4
]
.
T
h
er
e
ar
e
m
a
n
y
d
o
m
ai
n
s
d
ea
l
w
it
h
e
n
cr
y
p
tio
n
an
d
s
teg
a
n
o
g
r
ap
h
y
t
h
e
au
d
io
s
i
g
n
al,
s
u
c
h
as
tr
a
n
s
f
o
r
m
d
o
m
a
in
,
te
m
p
o
r
al
d
o
m
ai
n
,
a
n
d
co
d
ed
d
o
m
ai
n
.
E
n
cr
y
p
tio
n
/
s
te
g
an
o
g
r
ap
h
y
i
n
tr
an
s
f
o
r
m
d
o
m
ain
g
iv
e
s
g
r
ea
t
er
s
ec
u
r
it
y
[
2
5
,
2
6
]
.
Oth
er
r
e
s
ea
r
ch
er
s
h
a
v
e
also
s
u
g
g
e
s
ted
u
s
in
g
c
h
ao
tic
an
d
h
y
p
er
c
h
ao
tic
s
y
s
te
m
s
i
n
e
n
cr
y
p
tio
n
to
in
cr
ea
s
e
d
ata
s
ec
u
r
it
y
[
2
7
-
40
].
3.
I
NT
E
G
E
R
WAV
E
L
E
T
T
R
ANSF
O
RM
O
F
AN
AUDIO
SI
G
NA
L
I
n
teg
er
w
av
e
let
tr
an
s
f
o
r
m
(
I
W
T
)
is
a
ty
p
e
o
f
d
is
cr
ete
w
a
v
elet
tr
an
s
f
o
r
m
(
DW
T
)
.
I
t
h
as
a
s
ig
n
if
ican
t
p
r
o
p
er
ty
th
at
m
ak
in
g
it
b
ette
r
th
an
(
DW
T
)
,
w
h
er
e
I
W
T
c
o
ef
fi
cie
n
ts
h
av
e
t
h
e
s
i
m
ilar
d
y
n
a
m
ical
r
a
n
g
e
a
s
th
e
o
r
ig
i
n
al
s
i
g
n
a
l.
T
h
is
f
ac
ili
t
ates
t
h
e
p
r
o
g
r
ess
,
e
s
p
ec
iall
y
,
t
h
e
co
n
s
id
er
atio
n
s
d
ea
l
w
it
h
th
e
s
ize
o
f
th
e
v
ar
iab
les
to
b
e
u
tili
ze
d
,
an
d
th
e
r
an
g
es
t
o
ac
co
m
m
o
d
ate
i
n
t
h
e
co
d
in
g
alg
o
r
ith
m
[
4
1
,
4
2
]
.
I
W
T
I
t
is
u
s
ed
as
a
n
ef
f
icie
n
t
tr
an
s
f
o
r
m
t
h
at
co
n
v
er
ts
an
d
r
e
b
u
ild
s
d
ata
w
it
h
o
u
t
lo
s
s
.
T
h
is
p
r
o
v
id
es
h
i
g
h
e
f
f
icie
n
c
y
o
f
e
n
cr
y
p
tio
n
s
y
s
te
m
s
a
n
d
m
ak
e
s
t
h
e
d
ec
o
d
in
g
p
r
o
ce
s
s
f
o
r
d
ata
r
etr
iev
al
w
o
r
k
w
it
h
h
ig
h
ac
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r
ac
y
[
4
3
-
45
]
.
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
1
6
9
3
-
6930
T
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t
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o
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t
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e
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r
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s
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o
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h
a
n
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el
.
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h
e
e
n
c
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y
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t
e
d
m
ess
a
g
e
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s
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e
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e
d
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ti
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l
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o
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m
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s
s
a
g
e
.
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n
F
ig
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1
is
s
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o
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n
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m
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u
r
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1
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ith
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2
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s
t
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t
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s
ed
encr
y
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n a
lg
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rit
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m
W
e
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tio
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alg
o
r
it
h
m
as
f
o
llo
w
s
:
Input:
Audio file, Hand image
Output:
Encrypted audio file.
1.
Begin
2.
Fi
nd
th
e
ha
nd
pr
op
er
ti
es
wh
ic
h
ar
e
50
pr
op
er
ti
es
,
ea
ch
on
e
of
th
em
is
a
re
al
number.
3.
Sp
li
t
ea
ch
fe
at
ur
e
va
lu
e
(s
ay
F)
to
tw
o
pa
rt
s,
E_
k
ey
1
is
th
e
in
te
ge
r
nu
mb
er
of
F
and E_key2
is an
F fractional part. Note E_key1 and E_key2 must be [1
-
255]
4.
Sp
li
t
th
e
au
di
o
fi
le
in
t
o
N
of
se
gm
en
ts
,
wh
er
e
N
i
s
a
nu
mb
er
of
th
e
fo
un
de
d
ha
nd
properties.
5.
Convert
each s
egment
to IW
T which
will b
e prod
ucing
two othe
r port
ions:
CA and
CD.
6.
Al
l
CA
se
gm
en
ts
en
cr
yp
t
by
E_
ke
y1
an
d
E_
ke
y
2
de
pe
nd
in
g
on
CD
co
ef
fi
ci
en
ts
,
the following equation show
that more clearly:
E
n
c
r
y
p
t
e
d
CA
=
{
(
(
CA
⊕
E
_
ke
y
1
)
⊕
E
_
key
2
)
if
CD
<
0
(
(
CA
⊕
E
_
key
2
)
⊕
E
_
key
1
)
if
CD
>
=
0
7.
Switching
locations
between
the
two
segments
(CA
a
nd
CD)
and
usage
IWT
inve
rse
to
convert the two segments of the special domain.
8.
Reconstruct
the signal by segment combination.
Evaluation Warning : The document was created with Spire.PDF for Python.
T
E
L
KOM
NI
K
A
T
elec
o
m
m
u
n
C
o
m
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let
tr
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n
s
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a
n
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d
g
eo
ma
tr
y
(
Zeen
a
N
.
A
l
-
K
a
teeb
)
2015
9.
Randomize the resulted signal to guarantee strong security.
10.
Ke
ep
th
e
en
co
de
d
da
ta
in
a
ne
w
wa
ve
fi
le
,
an
d
se
nd
th
e
re
su
lt
ed
au
di
o
fi
le
to
th
e
receiver side via a transmission channel.
11.
End.
3
.
3
.
T
he
pro
po
s
ed
decr
y
ptio
n
a
lg
o
rit
h
m
Input: Encrypted audio file, Hand image
Output: Decrypted audio file.
1.
Begin
2.
Fi
nd
th
e
ha
nd
pr
op
er
ti
es
,
an
d
sp
li
t
ea
ch
va
lu
e
of
th
em
in
to
tw
o
pa
rt
s
(D
_k
e
y1
&
D_key2).
3.
Reorganize the encoded audio data.
4.
Sp
li
t
au
di
o
si
gn
al
in
to
N
of
se
gm
en
ts
,
wh
er
e
N
i
s
a
nu
mb
er
of
th
e
fo
un
de
d
ha
nd
properties.
5.
Convert each segment to IWT that will generate two parts: CA and CD.
6.
Switching locations between the two segments (CA and CD).
7.
Decrypt
CA
part
using
D_key1
with
D_key
2
d
ep
en
di
ng
on
CD
co
ef
fi
c
ie
nt
s,
the following
equation shows that more clearly:
D
e
c
r
y
p
t
e
d
CA
=
{
(
(
CA
⊕
D
_
key
1
)
⊕
D
_
key
2
)
if
CD
<
0
(
(
CA
⊕
D
_
key
2
)
⊕
D
_
key
1
)
if
CD
>
=
0
8.
Use IWT inverse to convert the encoded segments of the special domain.
9.
Collective all segments to construct the retrieved sig
nal and play it.
10.
End.
4.
E
XP
E
R
I
M
E
NT
A
L
So
m
e
m
etr
ics
ar
e
ca
lc
u
lated
to
m
ea
s
u
r
e
th
e
ef
f
icie
n
c
y
a
n
d
q
u
alit
y
o
f
e
n
cr
y
p
tio
n
a
n
d
d
ec
o
d
in
g
p
er
f
o
r
m
a
n
ce
.
T
h
ese
m
e
tr
ics
a
r
e:
th
e
v
al
u
e
o
f
m
ea
n
s
q
u
ar
e
er
r
o
r
(
Mse1
)
am
o
n
g
t
h
e
o
r
ig
i
n
al
au
d
io
f
ile
an
d
en
cr
y
p
ted
au
d
io
a
s
w
ell
as
t
h
e
v
al
u
e
o
f
co
r
r
elatio
n
a
m
o
n
g
th
e
m
(
C
o
r
r
l1
)
.
A
l
s
o
ca
lc
u
late
th
e
v
al
u
e
o
f
m
ea
n
s
q
u
ar
e
er
r
o
r
(
Mse2
)
an
d
th
e
v
alu
e
o
f
th
e
co
r
r
elatio
n
(
C
o
r
r
l2
)
a
m
o
n
g
th
e
o
r
ig
in
a
l
au
d
io
f
ile
an
d
d
ec
r
y
p
ted
au
d
io
.
Fig
u
r
e
2
ex
p
lai
n
t
h
e
au
d
io
f
il
e
b
ef
o
r
e
en
cr
y
p
tio
n
th
e
n
a
f
ter
en
cr
y
p
tio
n
an
d
la
s
t
o
n
e
a
f
ter
d
ec
r
y
p
tio
n
p
r
o
ce
s
s
.
W
h
er
e
T
a
b
le
1
s
h
o
w
s
t
h
e
g
o
tte
n
r
esu
lts
f
r
o
m
ap
p
l
y
i
n
g
t
h
e
p
r
o
p
o
s
ed
alg
o
r
ith
m
o
n
a
s
et
o
f
d
if
f
er
en
t
s
ize
o
f
W
A
V
t
y
p
e
au
d
io
f
ile
s
.
Fig
u
r
e
2
.
T
h
e
au
d
io
f
ile
;
(
a
)
o
r
ig
i
n
al
s
o
u
n
d
,
(
b
)
en
cr
y
p
t
s
o
u
n
d
,
(
c
)
d
ec
r
y
p
t so
u
n
d
T
ab
le
1
.
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o
w
th
e
r
es
u
lt
s
g
o
tt
en
f
r
o
m
t
h
e
p
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o
p
o
s
ed
alg
o
r
ith
m
o
n
a
s
et
o
f
d
if
f
er
en
t
s
ize
o
f
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A
V
t
y
p
e
au
d
io
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ile
s
F
i
l
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