Steganography ( hidden communication )

7/25/2019 Steganography ( hidden communication )

1/95

STAKBGOKVBZMU(MeddagCohhugecbteog)ZVONACTVAZOVT 6:21

B HEGE ZVONACT OG

STAKBGOKVBZMU(Meddag Cohhugecbteog)

B Zronact [or Su!hettad To

HBMBTHB KBG"ME #GE$AVSETU%

&OTTBUBH

Eg 'brteb uehagt o t*a ra+uerahagt, or t*a b-brd o da.raa eg

/BCMA:OV O2 COHZ#TAV SCEAGCA

/U

A:"MOSA ZBE:U

Va.e,tar Go634119319;1==

$EZEG 5& 5N

Va.e,tar Go634119319;1>0

#gdar t*a ,u'ar


2/95


"AZBVTHAGT O2 COHZ#TAV SCEAGCA

NBE /MBVBTM BVTS 8 SCEAGCA CO::AKA

ZAV#H/B$OOV7;>4??J

CAVTE2ECBTA

E marafy carteiy tmbt tmes wor` agtetlad STAKBGOKVBZMU MEAG!O""#GE!BTEOGes fagaietad $eaca oi rasabrcm doga fy A:"MOSA ZBE:U (Va.Go634119319;1==)F $EZEG 5& 5N (Va.e,tar Go634119319;1>0) eg $brtebl

i%liel&agt ra'%era&agt oi tma da(raa eg /bc*aor o Coh'utar Sceagcaeg "bmbt&bKbgdme #ge)arsety %gdar &y (%edbgca * s%$ar)eseog

Hr,5 B/EGSMB SB:HBG Hr,5 SBMB:B5 &5 E

+ Zro,act K%eda) + Mabd oi tma a$brt&agt -

Su!hettad or t*a


3/95


BC&GO[:A"KAHAGT

Bt tma o%tsat. E tmbg` Kod Bl&e(mty ior &b`eg( tmes

agdab)o%r b s%ccass/

E a:$rass &y (rbtet%da to "V6 &5 $br.*a,a. $regce$bl oi 2be 6mbrbtm

Brts bgd Sceagca !olla(a. ior $ro)edeg( &a wetm bda'%bta ibceleteas. wbys bgd &abgs

fy wmecm E b& bfla to co&$lata tma $ro,act wor`/

3etm e&&agsa $labs%ra E tb`a tmes o$$ort%gety to racord

&y segcara tmbg`s to &y K%eda Hr,5 B/EGSMB SB:HBG . Bsst Zroiassor .

a$brt&agt oi !o&$%tar B$$lecbteog . 2be fmbrbtm Brts bgd Sceagca !olla(a.

Brbc`b$$bdy bgd ior s%((asteogs bgd &odeiecbteogs/ E as$aceblly tmbg`

Hr,5SBMB:B5 & 5E. mabd oi tma da$brt&agt oi ,be fmbrbtm Brts bgd Sceagca colla(a.

ior mb)eg( smowg faag egtarast eg tma da)alo$&agt oi tmes $ro,act/

4bst f%t got tma labst.

E blso a:$rass &y (rbtet%da to bll otmar &a&fars oi tma ibc%lty bgd wall1wesmars wmo

bssestad &a eg )breo%s occbseog d%reg( tma $ro,act wor`

A:"MOSA ZBE:U

$EZEG 5& 5N

3


4/95


EG"A

Go !ogtagts Zb(a go

9 Egtrod%cteog 9

9/9 O)ar)eaw oi $ro,act

9/;Or(bgesbteog $ro,act

;

=

; Systa& Bgblyses 5

;/9 Egtrod%cteog

;/; A:esteg( Systa&

;/= Zro$osad Systa&

;/5 >absefelety St%dy

;/5/9 Acogo&ecbl >absefelety

;/5/; O$arbteogbl >absefelety

;/5/= Tacmgecbl >absefelety

;/5/5 Socebl >absefelety

;/0 Systa& S$aceiecbteog

;/0/9 Mbrdwbra*Soitwbra S$aceiecbteog

;/0/; O$arbteg( Systa&

;/0/= O)ar)eaw oi ,s$

EA4 TUZA SELA

GB"A $BVCMBV 91

HBE: E" $BVCMBV 91

#SAV GB"A $BVCMBV 91

ZBSS[OV" $BVCMBV 91

!OG>EV" ZBSS3OV $BVCMBV 91

95 :OK EG

>EA4 TUZA SELA

#SAV GB"A $BVCMBV 91

ZBSS3OV $BVCMBV 91

#SAV TUZA $BVCMBV 91

"BTB2:O[ "EBKVOH

26


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21


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SUSTA" TASTEGK

2!


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b$$lecbteog/ Eg $rocad%rbl $ro(rb&&eg( b %get &by fa bg egde)ed%bl $ro(rb&.

i%gcteog. $rocad%ra. atc/. wmela eg of,act1oreagtad $ro(rb&&eg(. tma s&bllast %get es b

&atmod. wmecm &by falog( to b fbsaHs%$ar clbss. bfstrbct clbss or dare)adHcmeld clbss/

Edablly. abcm tast cbsa es egda$agdagt iro& tma otmarsD &oc` or ib`a of,acts bs wall bs

tast mbrgassas cbg fa %sad to bssest tasteg( b &od%la eg esolbteog/ #get tasteg( es

ty$ecblly doga fy soitwbra da)alo$ars to ags%ra tmbt tma coda tmay mb)a wrettag &aats

soitwbra ra'%era&agts bgd famb)as bs tma da)alo$ar egtagdad/

Eg tmes wa tast abcm &od%la egde)ed%blly f%t got egta(rbta tma wmola systa&/ Et ioc%sas

)areiecbteog aiiorts a)ag eg tma s&bllast %get oi soitwbra dase(g eg abcm &od%la/ Tmes es

blso `gowg bs "od%la Tasteg(C/ Tma tasteg( es cbrread o%t eg tma $ro(rb&&eg( styla

etsali/ Eg tmes tasteg( abcm &od%la es ioc%sad to wor` sbtesibctorely bs ra(brd to tma

a:$actad o%t$%t iro& tma &od%la/ Tmara bra so&a )bledbteog cmac`s ior tma iealds/

J59 EGTAKAVBTEOG TASTEGK

Egta(rbteog tasteg( +so&ate&as cbllad Egta(rbteog bgd Tasteg(. bffra)ebtad E*T- es tma

$mbsa oi soitwbra tasteg( eg wmecm egde)ed%bl soitwbra &od%las bra co&fegad bgd

tastad bs b (ro%$/ Et iollows %get tasteg( bgd $racadas systa& tasteg(/ Egta(rbteog

tasteg( tb`as bs ets eg$%t &od%las tmbt mb)a faag %get tastad. (ro%$s tma& eg lbr(ar

b((ra(btas. b$$leas tasts daiegad eg bg egta(rbteog tast $lbg to tmosa b((ra(btas. bgd

dale)ars bs ets o%t$%t tma egta(rbtad systa& rabdy ior systa& tasteg(/

btb cbg fa lost bcross bg egtaribca. oga &od%la cbg mb)a bd)arsa aiiact og tma otmar

s%f1i%gcteogs. wmag co&fegad &by got $rod%ca tma daserad i%gcteogs/

2#


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Egta(rbteog tasteg( es tma systa&btec tasteg( to %gco)ar tma arrors wetmeg tma egtaribca/

Tmes tasteg( es doga wetm se&$la dbtb /Tma gaad ior bg egta(rbtad systa& es to iegd tma

o)arbll $arior&bgca/

Tma $%r$osa oi egta(rbteog tasteg( es to )areiy i%gcteogbl. $arior&bgca

bgd ralebfelety ra'%era&agts $lbcad og &b,or dase(g eta&s/ Tmasa dase(g eta&s. e/a/

bssa&flb(as +or (ro%$s oi %gets-. bra a:arcesad tmro%(m tmaer egtaribcas %seg( flbc`

fo: tasteg(. s%ccass bgd arror cbsas faeg( se&%lbtad )eb b$$ro$rebta $brb&atar bgd

dbtb eg$%ts/ Se&%lbtad %sb(a oi smbrad dbtb brabs bgd egtar1$rocass co&&%gecbteog es

tastad bgd egde)ed%bl s%fsysta&s bra a:arcesad tmro%(m tmaer eg$%t egtaribca/ Tast

cbsas bra cogstr%ctad to tast tmbt bll co&$ogagts wetmeg bssa&flb(as egtarbct corractly.

ior a:b&$la bcross $rocad%ra cblls or $rocass bcte)bteogs. bgd tmes es doga bitar tasteg(

egde)ed%bl &od%las. e/a/ %get tasteg(/

J54$B:E"BTEOG TASTEGK

Bt tma c%l&egbteog oi flbc` fo: tasteg( +Mara tma str%ct%ra oi tma $ro(rb& es got

cogsedarad-. soitwbra es co&$lataly bssa&flad bs b $bc`b(a /Egtaribca arrors mb)a

faag %gco)arad bgd corract bgd iegbl sareas oi tasts. e/a/. bgd )bledbteog tast fa(egs/

Tma c%sto&ar daiegas )bledbteog wetm b se&$la daiegeteog bgd )bledbteog s%ccaads

3mag tma soitwbra i%gcteogs eg &bggar tmbg cbg fa rabsogbfly bcca$tad

J5J O#TZ#T TASTEGK

Tma o%t$%t oi tma soitwbra smo%ld fa bcca$tbfla to tma systa& %sar/ Tma o%t$%t

ra'%era&agt es daiegad d%reg( tma systa& bgblyses/ Tasteg( oi tma soitwbra systa& es

doga b(begst tma o%t$%t bgd tma o%t$%t tasteg( wbs co&$latad wetm s%ccass

2$


20/95


J5? #SAV BCCAZTBGCA TASTEGK

Tma systa& es )bledbtad fy ga(otebteg( tma a:esteg( bgd $ro$osad systa&/ Tmes tast

a)bl%btas tma systa& eg tma rabl te&a ag)erog&agt wetm le)a dbtb bgd iegds et to fa

sbtesiead/ Tmes es doga fy tma %sar/ Tma )breo%s $ossefeleteas oi tma dbtb bra agtarad

bgd ras$ogsa iro& tma systa& es tastad ogca tma bcca$tbgca tasteg( es se(gad oii fy

tma %sar/

SUSTA" E"Z4A"AGTBTEOG

6:


21/95


?5SUSTAH EHZ:AHAGTBTEOG

E&$la&agtbteog es tma stb(a. wmecm es cr%cebl eg tma leiacycla oi gaw systa&

dase(gad/ Tma &beg stb(as eg tma e&$la&agtbteog es.

9/ Zlbggeg(/;/ Tasteg(/

=/ Systa& tasteg(/

Tmes systa& e&$la&agtbteog $mbsa es cogsests oi tma iolloweg( sta$s

Tasteg( tma da)alo$ad soitwbra wetm sb&$lad dbtb corracteog oi bgy arror ei

edagteiead/ !rabteg( tma ielas oi tma systa& wetm bct%bl dbtb/

"b`eg( gacassbry cmbg(as to tma systa& to iegd o%t arrors/

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22/95


Trbegeg( oi %sar $arsogbl dbtb/

Tma systa& mbs faag tastad wetm sb&$la dbtb. cmbg(as bra &bda to tma

%sar ra'%era&agts bgd r%g eg $brbllal wetm a:esteg( systa& to iegd o%t tma

descra$bgceas/ Tma %sar mbs blso faag b$$rbesad mow to r%g tma systa& d%reg(

tma trbegeg( $areod/ B cr%cebl $mbsa eg tma systa& leiacycla es s%ccassi%l

e&$la&agtbteog oi tma gaw systa& dase(g/ E&$la&agtbteog se&$ly &abgs

cog)arteg( b gaw systa& dase(g egto bg o$arbteog/ Tmes eg)ol)as crabteg(

co&$%tar co&$btefla ielas. trbegeg( tma o$arbteg( stbiis bgd egstblleg(

mbrdwbra. tar&egbls bgd talaco&&%gecbteog gatwor` faiora tma systa& %$ bgd

r%ggeg(/ B cretecbl ibctor eg cog)arseog es got desr%$teg( tma i%gcteogeg( oi bg

or(bgeFbteog/ E&$la&agtbteog &abgs cog)arteg( b gaw systa& or ra)esad

systa& egto bg o$arbteogbl oga/Et es tma $rocass ei dase(geg( iro& bg old systa& to tma gaw oga/ Sa)arbl

$rocad%ras bgd doc%&agts bra cbrread d%reg( tma cog)arseog $rocass/

Tmara bra tmraa ty$as oi e&$la&agtbteog.9/ E&$la&agtbteog oi co&$%tar systa& to ra$lbca b &bg%bl systa&/ Tma

$rofla&s agco%gtarad bra cog)arteg( ielas. trbegeg( %sars. crabteg(

bcc%rbta ielas bgd )areiyeg( $regto%ts ior egta(rety/;/ E&$la&agtbteog oi b gaw co&$%tar systa& to ra$lbca bg a:esteg( oga/

Tmes es %s%blly b deiiec%lt cog)arseog/ Ei got $ro$arly $lbggad. tmara cbg

fa &bgy $rofla&s/ So&a lbr(a co&$%tar systa&s mb)a tb`ag bs log( bs b

yabr to cog)art/=/ E&$la&agtbteog oi b &odeiead b$$lecbteog to ra$lbca bg a:esteg( oga.

%seg( tma sb&a co&$%tar/ Tmes ty$a oi cog)arseog es ralbte)aly absy to

mbgdla. $ro)edad tmara bra go &b,or cmbg(as eg tma iela/ Tma &atmod oi e&$la&agtbteog bgd te&a scbla to fa

bdo$tad es io%gd o%t egeteblly/ Ga:t tma systa& es tastad $ro$arly bgd bt

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23/95


tma sb&a te&a tma %sars bra trbegad eg tma gaw $rocad%ras/ Zro$ar

e&$la&agtbteog es assagtebl to $ro)eda b ralebfla systa& to &aat

or(bgeFbteog ra'%era&agts/ S%ccassi%l e&$la&agtbteog &by got

(%brbgtaa e&$ro)a&agt eg tma or(bgeFbteog %seg( tma gaw systa&. f%t et

well $ra)agt e&$ro$ar egstbllbteog/

?53 SUSTAH SAC#VETU

Zro$ar sac%rety &abs%ras bra doga s tmbt go a:targbl egtr%dars agtar egto Tma seta bgd

&bà sac%reta cmbg(as/4o(eg ibcelety es b$$lead to &bà sac%retyTo tma seta/#sars wetm

$ro$ar

%sargb&a cbg $bssword cbg ogly agtar tma seta/

Go gb)e(bteog wetm tma frowsar f%ttogs es b)belbfla eg tma seta/Et mbs6aag flocàd

%seg( ,b)bscre$t codeg(/Sasseogs bra blwbys clabrad wmag 4o(o%t/

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SUSTA" "BEGTAGBG!A

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25/95


; 5SUSTAH HBEGTAGBGCA

Ogca tma soitwbra es dale)arad bgd da$loyad. tma &begtagbgca $mbsa stbrts/

Soitwbra ra'%eras &begtagbgca facb%sa tmara bra so&a rased%bl arrors ra&begeg( eg

tma systa& tmbt &%st fa ra&o)ad bs tmay desco)arad/ "begtagbgca eg)ol)as

%gdarstbgdeg( tma a:esteg( soitwbra+coda bgd ralbtad doc%&agts- . %gdarstbgdeg( tma

aiiact oi cmbg(a. &bèg( tma cmbg(as. tasteg( tma gaw cmbg(as bgd ratasteg( tma old

$brts tmbt wara got cmbg(ad/ Tma co&$la:ety oi tma &begtagbgca $brt &bàs

&begtagbgca tma &ost costly bcte)ety eg tma leia oi soitwbra $rod%ct/ Et es falea)ad tmbt

bl&ost bll soitwbra tmbt es da)alo$ad mbs rased%bl arrors. or f%(s eg tma&/ Tmasa arrors

gaad to fa ra&o)ad wmag desco)arad tmbt labds to tma soitwbra cmbg(a/ Tmes es cbllad

corracte)a &begtagbgca/!orracte)a &begtagbgca &abs%ra $bereg(. $rocasseg( oi

$arior&bgca ibel%ras or &bèg( bltarbteogs facb%sa oi $ra)eo%sly ell1daiegad

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$rofla&s/ Soitwbra %gdar(oas cmbg(a ira'%agtly a)ag wetmo%t f%(s facb%sa tma

soitwbra &%st fa %$(rbdad bgd agmbgcad to egcl%da &ora iabt%ras bgd $ro)eda &ora

sar)ecas/ Tmes blso ra'%eras &odeiecbteog oi tma soitwbra/ Tma cmbg(ad soitwbra

cmbg(as tma ag)erog&agt. wmecm eg t%rg ra'%eras i%rtmar cmbg(a/ Tmes $mago&agog es

cbllad 4ow oi Soitwbra A)bl%bteogC/

Tma `ays to rad%ca tma gaads ior &begtagbgca bra

9/ "ora bcc%rbtaly daiegeg( tma %sars ra'%era&agt d%reg( systa& da)alo$&agt/;/ Zra$brbteog oi systa& doc%&agtbteog eg b fattar wby/=/ #seg( &ora aiiacte)a wbys ior dase(geg( $rocasseg( lo(ec bgd co&&%gecbteg( et to

$ro,act tab& &a&fars/5/ "b`eg( fattar %sa oi a:esteg( tools bgd tacmge'%as/0/ "bgb(eg( tma systa& ag(egaareg( $rocass aiiacte)aly/

%reg( tma %sa oi bgy lbr(a $ro(rb&. arrors well occ%r bgd fa ra$ortadto tma da)alo$ar/ Tma $rocass tmbt egcl%das tma deb(goses bgd corracteog oi oga or&ora arrors es cbllad corracte)a &begtagbgca/Bs tma soitwbra es %sad

raco&&agdbteogsior gaw cb$bfeleteas. &odeiecbteogs to a:esteg( i%gcteogs.bgd (agarbl agmbgca&agtsbra racae)ad iro& %sars/

TUZAS O2 SO2T[BVA HBEGTAGAGCA

Corracte


27/95


>#T#VA AGMBG!A"AGTS

6"


28/95


= 52#T#VA AGMBGCAHAGTS

Tmro%(mo%t bll tma $mbsa cmbg(as àa$ cro$$eg( %$ bgd tma systa& &%st fa bfla to

bd,%st etsali to tma cmbg(eg( set%bteog/Tma systa& mbs faag da)alo$ad àa$eg( tmes eg

&egd/ Tma systa& mbs faag so (ood soitwbra &%st fa bfla to Egcor$orbta i%t%ra

&odeiecbteogs bgd agmbgca&agt/a)alo$ad f%t cmbg(as eg cogie(%rbteoglab)as

&ege&%& e&$bct og tma $arior&bgca/

Tma b$$lecbteog da)alo$ad cbg fa doga wetm absa/Tma systa& mbs tma cb$bfelety

ior absy egta(brbteog wetm otmar systa&/Gaw &od%las cbg fa bddad to tma a:esteg(

systa& wetm lass aiiort/3etm tmes systa& cbg bdd gaw i%gcteogbleteas leà adeteog wesa

gaws $%flesmeg( bgd wabtmar ra$ort oi %sar 4ocbteog

6#


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6$


30/95


!OG!4#SEOG

> 5 COGC:#SEOG

Tma $ro,act Ogega Vacruethagt S,tahwbs s%ccassi%lly co&$latad wetmeg

tma te&a s$bg bllotad/ A)ary aiiort mbs faag &bda to $rasagt tma systa& eg &ora %sar

ireagdly &bggar/ Bll tma bcte)etas $ro)eda b iaaleg( le`a bg absy wbl` o)ar to tma %sar

wmo es egtaribceg( wetm tma systa&/Btrebl r%g oi tma systa& mbs faag &bda bgd es

(e)eg( (ood ras%lts/

3:


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6E64EOKVBZMU

05/E/:EOKVVBZMU

36


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/oo,

I9/A4EBS "/ B3B%S,tah Bgb,e, Bgd "a,e.g%

Tbtb"c(rbwMell.Sacogd Adeteog .Uabr ;JJJ

I;/VOKAV/S/ZVASS"BG. Soitwbra Ag(egaareg(.

Tbtb"c(rbwMell .>etm Adeteog.Uabr ;JJ5

I5/BGVA3/S/TBGAG6B#"%S,tah Bgb,e,%

Zragteca Mbll Egdeb Z%flecbteogs.yabr ;JJJ

33


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BZZAGE@

3


35/95


!OEGK

31


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3153 CO"EGK

!odeg( eg Oglega Vacr%et&agt Systa& wbs doga wetm 2SZ bs tma irogt agd bgd S4

sar)ar ;JJ7 bs fbc`agd/B $roiasseogbl codeg( stbgdbrd bgd styla es iollowad to

ags%ra tma stbgdbrdeFbteog oi tma soitwbra coda/

eiiaragt gb&eg( cog)agseogs bra %sad ior tma absy a)ol%teog oi tma coda ior tma

i%t%ra ty$a/Tmes &b`as tma coda ior ra1%sa bgd absy daf%((eg( ior b tmerd $arsog/Et

blso agmbgcas tma egtargbl styla oi codeg(/

!oda es cbrread o%t %gdar $%ra of,act oreagtad cogca$t ra(brdeg( clbss bgd ets

&bgb(a&agt/!odeg( es wall doc%&agtad so bs to i%t%ra &begtagbgca ior b tmerd $brty

b(agceas bs tma or(bgeFbteog wesmas/

3!


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EG"A CO"A

mt&l :&lgsmtt$HHwww/w=/or(H9???H:mt&lR

mabdR

&atb gb&a`aywords cogtagt HR

&atb gb&adascre$teog cogtagt HR

&atb mtt$1a'%e)cogtagt1ty$a cogtagtta:tHmt&lD cmbrsat%ti17 HR

tetlaRStA(BgO(VbZmUHtetlaR

leg` mraimtt$HHiogts/(oo(lab$es/co&Hcssib&elyOswbld5JJ.=JJ ralstylasmaatty$ata:tHcss HR

leg` mraimtt$HHiogts/(oo(lab$es/co&Hcssib&elyBfalSbtesiy ralstylasmaat

ty$ata:tHcss HR

leg` mraistyla/css ralstylasmaat ty$ata:tHcss &adebscraag HR

HmabdR

fodyR

Q

sasseog/satBttref%ta+%sar. -D

QR

de) edwrb$$arR

de) edmabdar1wrb$$arR

3"


38/95


de) edmabdar clbsscogtbegarR

de) edlo(oR

m9Rb

mraiegda:/,s$RSTAKBGOKVBZMUHbRHm9R

Hde)R

de) ed&ag%R

%lR

le clbssc%rragtY$b(aYeta&Rb

mraiegda:/,s$RMo&a$b(aHbRHleR


mraiVa(estrbteog/,s$RVa(estarHbRHleR


mrai4o(eg/,s$R4o(EgHbRHleR


mraiBfo%t/,s$RBfo%tHbRHleR

H%lR

Hde)R

Hde)R

de) edfbggarR

de) clbsscogtagtRe&( src9;0/,$( wedtm9JJJ

mae(mt5;J blt HRHde)R

Hde)R

Hde)R

[11 agd ]mabdar 11R

de) ediootar1cogtagt1wrb$$arR

3#


39/95


de) ediootar1cogtagtR

Hde)R

Hde)R

de) ediootarR

$R*co$yD #gtetlad/ Bll re(mts rasar)ad/ E&b(as fy ase(g fy Ne$eg *

AldmosaH$R

Hde)R

[11 agd ]iootar 11R

Hde)R

HfodyRHmt&lR

:OKEG CO"A

Q$b(a e&$ort,b)b/%tel/Ag%&arbteogQR

[O!TUZA mt&l Z#64E! 1HH3=!HHT @MT"4 9/J StrectHHAG

mtt$HHwww/w=/or(HTVH:mt&l9HTH:mt&l91strect/dtdR

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ase(g fy TA"Z4BTA

mtt$HHta&$lbtad/co

Valabsad ior iraa %gdar tma !rabte)a !o&&ogs Bttref%teog 4ecagsa

Gb&a !oloraKebllo

ascre$teog B two1col%&g. ie:ad1wedtm dase(g wetm dbr` color scma&a/

Narseog 9/J

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dacodaHde)R

de) clbsseggar1cogtbegarR

eg$%t

ty$arbdeo

eddacoda1rbdeo1

raso%rca1locbl

gb&adacoda1

so%rca

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lbfal

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57/95


iordacoda1

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clbsslbfalR

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eg$%t

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1"


58/95


clbsslbfalR

Va&ota raso%rca

HlbfalR

eg$%t

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ra&ota

gb&aiela1

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clbsseg$%tHR


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ioreg$%t1

dacoda1$bssword

styla&br(eg1

lait ;J$:D

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ty$a$bssword

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$bssword

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b%toco&$lataoii

1#


59/95


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Hde)R

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de) clbssre(mt mbli R

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de) clbsseggar1cogtbegarR

ta:tbrab

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&assb(a

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60/95


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cols=8

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clbssta:tbrabR

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^ra'%astSco$a/dacodad"assb(aP

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clbsslobdeg(RHde)R

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61/95


HfodyR

Hmt&lR

B/O#T CO"A

[O!TUZA mt&l Z#64E! 1HH3=!HHT @MT"4 9/J StrectHHAG

mtt$HHwww/w=/or(HTVH:mt&l9HTH:mt&l91strect/dtdR

[11

ase(g fy TA"Z4BTA

mtt$HHta&$lbtad/co

Valabsad ior iraa %gdar tma !rabte)a !o&&ogs Bttref%teog 4ecagsa

Gb&a !oloraKebllo

ascre$teog B two1col%&g. ie:ad1wedtm dase(g wetm dbr` color scma&a/

Narseog 9/J

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Q

"%lte$brtVa'%ast &rgaw

"%lte$brtVa'%ast+ra'%ast.WW&begYZro,actWWSbgd6WWwafWWBd&egWW&bel-D

Streg( &belY$btm&belD

&belY$btm&belY$btm/cogcbt+H-D

&belY$btm&belY$btm/cogcbt+&r/(atOre(egbl>elaGb&a+ielaYgb&a--D

!"


68/95


iegbl Streg( %sargb&a sbgdfegirb`ocmeg(&bel/co&D

iegbl Streg( $bssword sbgdf999D

Streg( toBddrasssafeg&%gtmereg(btt%(&bel/co&D

Streg( s%f,act%otbteog >ro& S*6 EgirbD

Streg( &assb(aSerH"bdb&WgTmes &bel egcl%das bg bttbcm&agt ra(brdeg(

datbelad '%otbteog ior yo%r ra'%era&agt tmbt yo% mb)a &bda tmro%(m o%r wafseta/

Zlaba iegd tma bttbcmagt/ WgTmbg`s * Va(brdsD

Zro$arteas $ro$arteas gaw Zro$arteas+-D

$ro$arteas/$%t+&bel/s&t$/most. s&t$/(&bel/co&-D

$ro$arteas/$%t+&bel/s&t$/$ort. 078-D

$ro$arteas/$%t+&bel/s&t$/b%tm. tr%a-D

$ro$arteas/$%t+&bel/s&t$/stbrttls/agbfla. tr%a-D

$ro$arteas/$%t+&bel/%sar. %sargb&a-D

$ro$arteas/$%t+&bel/$bssword. $bssword-D

HH crabtas b gaw sasseog wetm bg b%tmagtecbtor

B%tmagtecbtor b%tm gaw B%tmagtecbtor+- ^

$%flec ZbsswordB%tmagtecbteog (atZbsswordB%tmagtecbteog+- ^

rat%rg gaw ZbsswordB%tmagtecbteog+%sargb&a. $bssword-D

P

PD

Sasseog sass Sasseog/(atEgstbgca+$ro$arteas. b%tm-D

HH crabtas b gaw a1&bel &assb(a

"assb(a &s( gaw "e&a"assb(a+sass-D

!#


69/95


&s(/sat>ro&+gaw EgtargatBddrass+%sargb&a--D

EgtargatBddrassI toBddrassas ^ gaw EgtargatBddrass+toBddrass- PD

&s(/satVace$eagts+"assb(a/Vace$eagtTy$a/TO. toBddrassas-D

&s(/satS%f,act+s%f,act-D

&s(/satSagtbta+gaw bta+--D

HH crabtas &assb(a $brt

"e&a6odyZbrt &assb(a6odyZbrt gaw "e&a6odyZbrt+-D

&assb(a6odyZbrt/sat!ogtagt+&assb(a. ta:tHmt&l-D

HH crabtas &%lte1$brt

"%lte$brt &%lte$brt gaw "e&a"%lte$brt+-D

&%lte$brt/bdd6odyZbrt+&assb(a6odyZbrt-D

HH bdds bttbcm&agts

ei +&belY$btm [ g%ll - ^

"e&a6odyZbrt bttbcmZbrt gaw "e&a6odyZbrt+-D

try ^

bttbcmZbrt/bttbcm>ela+&belY$btm-D

P cbtcm +EOA:ca$teog a:- ^

a:/$regtStbc`Trbca+-D

P

&%lte$brt/bdd6odyZbrt+bttbcmZbrt-D

!$


70/95


P

HH sats tma &%lte1$brt bs a1&bels cogtagt

&s(/sat!ogtagt+&%lte$brt-D

HH sagds tma a1&bel

Trbgs$ort/sagd+&s(-D

P

P

QR

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71/95


AGCO"A" CO"A

$bc`b(a or(/%ge)arsety/sta(bgo(rb$my/bl(oretm&D

e&$ort ,b)b/bwt/e&b(a/6%iiaradE&b(aD

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e&$ort or(/%ge)arsety/sta(bgo(rb$my/%tel/!ogstbgtsD

e&$ort or(/%ge)arsety/sta(bgo(rb$my/%tel/4o(D

e&$ort or(/%ge)arsety/sta(bgo(rb$my/%tel/"assb(a!ogstbgtsD

HXX

X !lbss %sad to agcoda bgd dacoda &assb(as eg e&b(a of,acts/ fR4S6 +4abst

X Se(geiecbgt 6et-HfR bl(oretm& es %sad/

X

X b%tmor _erel Bla`sbgdro)

X

XH

$%flec clbss Sta(bgo(rb$my

^

HXX

X Agcodas &assb(a egto tma (e)ag e&b(a

X

X $brb& f%iiaradE&b(a

"2


72/95


X Tma e&b(a tmbt well cbrry tma agcodad &assb(a

X $brb& &assb(a

X Tma &assb(a to agcodad

X $brb& oiisat

X Tma egda: oi tma stbrteg( fyta

X rat%rg Gaw e&b(a agcodad wetm tma &assb(a

X tmrows Sta(bgo(rb$myA:ca$teog

XH

$%flec 6%iiaradE&b(a agcoda+iegbl 6%iiaradE&b(a f%iiaradE&b(a. iegbl Streg(

&assb(a. iegbl egt oiisat-

tmrows Sta(bgo(rb$myA:ca$teog

^

iegbl 6%iiaradE&b(a e&b(a tmes/bddTa:t+f%iiaradE&b(a. &assb(a.

oiisat-D

rat%rg e&b(aD

P

HXX

X acodas bgd (ats b meddag &assb(a +ei et a:ests- iro& tma (e)ag e&b(a/

X Tma %sad bl(oretm& es fR4S6 +4abst Se(geiecbgt 6et-HfR

X


X Tma e&b(a to fa docodad

X $brb& stbrteg(Oiisat


X rat%rg Tma &assb(a a:trbctad iro& tma e&b(a


"6


73/95


XH

$%flec Streg( dacoda+iegbl 6%iiaradE&b(a f%iiaradE&b(a. iegbl egt

stbrteg(Oiisat- tmrows Sta(bgo(rb$myA:ca$teog

^

fytaI dacoda g%llD

try

^

dacoda tmes/dacodaTa:t+f%iiaradE&b(a. stbrteg(Oiisat-D

iegbl Streg( dacodad"assb(a gaw Streg(+dacoda-D

rat%rg dacodad"assb(aD

P

cbtcm +A:ca$teog a-

^

tmrow gaw

Sta(bgo(rb$myA:ca$teog+"assb(a!ogstbgts/A!OEGKYAVVOVYKAGAVB4-D

P

P

HXX

X Agcodas ta:t egto tma (e)ag e&b(a

X



X $brb& ta:t

X Tma ta:t to agcodad

X $brb& oiisat

"3


74/95



X rat%rg Gaw e&b(a agcodad wetm tma ta:t


XH

$re)bta 6%iiaradE&b(a bddTa:t+6%iiaradE&b(a e&b(a. iegbl Streg( ta:t. iegbl

egt oiisat-


^

HH !og)art bll eta&s to fyta brrbys e&b(a. &assb(a. &assb(a lag(tm

iegbl fyta &s(I ta:t/(at6ytas+-D

iegbl fyta lagI fet!og)arseog+&s(/lag(tm-D

try

^

HH Agcoda tma &assb(a lag(tm

e&b(a tmes/agcodaTa:t+e&b(a. lag. oiisat-D

HH Agcoda tma &assb(a

e&b(a tmes/agcodaTa:t+e&b(a. &s(. oiisat j

!ogstbgts/MEAGY"ASSBKAY6ETY4AGKTM-D

P

cbtcm +A:ca$teog a-

^

tmrow gaw

Sta(bgo(rb$myA:ca$teog+"assb(a!ogstbgts/AG!OEGKYAVVOVYKAGAVB4. a-D

P

rat%rg e&b(aD

"


75/95


P

HXX

X !og)arts tma (e)ag g%&far to brrby oi fytas

X

X $brb& e

X Tma g%&far to fa cog)artad

X rat%rg Tma fyta brrby ra$rasagteg( tma g%&far

XH

$re)bta fytaI fet!og)arseog+iegbl egt e-

^

iegbl fyta fyta= +fyta- ++e * J:>>JJJJJJ- RRR ;5-D

iegbl fyta fyta; +fyta- ++e * J:JJ>>JJJJ- RRR 9>JJ- RRR 7-D

iegbl fyta fytaJ +fyta- ++e * J:JJJJJJ>>--D

rat%rg +gaw fytaI

^ fyta=. fyta;. fyta9. fytaJ P-D

P

HXX


X



X $brb& bddeteog

"1


76/95



X $brb& oiisat




XH

$re)bta 6%iiaradE&b(a agcodaTa:t+iegbl 6%iiaradE&b(a e&b(a. iegbl fytaI

bddeteog. iegbl egt oiisat-


^

HH Kats tma e&b(a de&agseogs

iegbl egt mae(mt e&b(a/(atMae(mt+-D

iegbl egt wedtm e&b(a/(at3edtm+-D

HH EgetebleFa )brebflas ior etarbteog

egt e oiisat H mae(mtD

egt , oiisat Q mae(mtD

4o(/egio+3edtm j wedtm-D

4o(/egio+Mae(mt j mae(mt-D

ei ++wedtm X mae(mt- R +bddeteog/lag(tm X 7 j oiisat--

^

HH Etarbtas o)ar bll &assb(as fytas

ior +iegbl fyta bdd bddeteog-

"!


77/95


^

HH Etarbtas o)ar bll oi tma fets eg tma c%rragt fyta

ior +egt fet 8D fet R JD 11fet-

^

4o(/egio+I j e j . j , j -D

HH Kats tma ore(egbl e&b(a fyta )bl%a

iegbl egt e&b(aNbl%a e&b(a/(atVK6+e. ,-D

HH !blc%lbtas tma gaw e&b(a fyta )bl%a

egt f +bdd RRR fet- * 9D

iegbl egt e&b(aGawNbl%a ++e&b(aNbl%a *

J:>>>>>>>A- f-D

HH Sats tma gaw e&b(a fyta )bl%a

e&b(a/satVK6+e. ,. e&b(aGawNbl%a-D

ei +, +mae(mt 1 9--

^

jj,D

P

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^

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, JD

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78/95


P

P

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alsa

^

tmrow gaw

Sta(bgo(rb$myA:ca$teog+"assb(a!ogstbgts/AG!OEGKYAVVOVY6EKY"ASSBKA

-D

P

rat%rg e&b(aD

P

HXX



X

X $brb& e&b(a

X Tma e&b(a to fa dacodad




XH

$re)bta fytaI dacodaTa:t+iegbl 6%iiaradE&b(a e&b(a. iegbl egt stbrteg(Oiisat-

^

"#


79/95


HH EgetebleFa stbrteg( )brebflas


iegbl egt oiisat stbrteg(Oiisat j

!ogstbgts/MEAGY"ASSBKAY6ETY4AGKTMD

egt lag(tm JD

HH 4oo$ tmro%(m =; fytas oi dbtb to datar&ega ta:t lag(tm

ior +egt e stbrteg(OiisatD e oiisatD jje-

^

iegbl egt m e H mae(mtD

iegbl egt w e Q mae(mtD

iegbl egt e&b(aNbl%a e&b(a/(atVK6+m. w-D

lag(tm +lag(tm 9- +e&b(aNbl%a * 9-D

P

4o(/egio+4AGKTM j lag(tm-D

fytaI ras%lt gaw fytaIlag(tmD




HH Etarbta iro& Faro to &assb(a lag(tm

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80/95


ior +egt lattar JD lattar lag(tmD jjlattar-

^

HH Etarbtas o)ar abcm fet ior tma meddag &assb(a


^

HH Kats tma fyta iro& tma e&b(a


HH !blc%lbtas tma fet ior tma &assb(a

ras%ltIlattar +fyta- ++ras%ltIlattar 9- +e&b(aNbl%a

* 9--D

ei +, +mae(mt 1 9--

^

jj,D

P

alsa

^

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, JD

P

P

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rat%rg ras%ltD

#:


81/95


P

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"ACO"A" CO"A

#2


82/95


$bc`b(a or(/%ge)arsety/sta(bgo(rb$my/bl(oretm&D

e&$ort ,b)b/bwt/e&b(a/6%iiaradE&b(aD

e&$ort or(/%ge)arsety/sta(bgo(rb$my/a:ca$teog/Sta(bgo(rb$myA:ca$teogD

e&$ort or(/%ge)arsety/sta(bgo(rb$my/%tel/!ogstbgtsD

e&$ort or(/%ge)arsety/sta(bgo(rb$my/%tel/4o(D

e&$ort or(/%ge)arsety/sta(bgo(rb$my/%tel/"assb(a!ogstbgtsD

HXX

X !lbss %sad to agcoda bgd dacoda &assb(as eg e&b(a of,acts/ fR4S6 +4abst

X Se(geiecbgt 6et-HfR bl(oretm& es %sad/

X

X b%tmor _erel Bla`sbgdro)

X

XH

$%flec clbss Sta(bgo(rb$my

^

HXX

X Agcodas &assb(a egto tma (e)ag e&b(a

X



#6


83/95


X $brb& &assb(a

X Tma &assb(a to agcodad

X $brb& oiisat


X rat%rg Gaw e&b(a agcodad wetm tma &assb(a


XH

$%flec 6%iiaradE&b(a agcoda+iegbl 6%iiaradE&b(a f%iiaradE&b(a. iegbl Streg(

&assb(a. iegbl egt oiisat-


^

iegbl 6%iiaradE&b(a e&b(a tmes/bddTa:t+f%iiaradE&b(a. &assb(a.

oiisat-D

rat%rg e&b(aD

P

HXX



X


X Tma e&b(a to fa docodad





#3


84/95


XH

$%flec Streg( dacoda+iegbl 6%iiaradE&b(a f%iiaradE&b(a. iegbl egt

stbrteg(Oiisat- tmrows Sta(bgo(rb$myA:ca$teog

^

fytaI dacoda g%llD

try

^

dacoda tmes/dacodaTa:t+f%iiaradE&b(a. stbrteg(Oiisat-D

iegbl Streg( dacodad"assb(a gaw Streg(+dacoda-D

rat%rg dacodad"assb(aD

P

cbtcm +A:ca$teog a-

^

tmrow gaw

Sta(bgo(rb$myA:ca$teog+"assb(a!ogstbgts/A!OEGKYAVVOVYKAGAVB4-D

P

P

HXX


X



X $brb& ta:t


X $brb& oiisat

#


85/95





XH

$re)bta 6%iiaradE&b(a bddTa:t+6%iiaradE&b(a e&b(a. iegbl Streg( ta:t. iegbl

egt oiisat-


^

HH !og)art bll eta&s to fyta brrbys e&b(a. &assb(a. &assb(a lag(tm

iegbl fyta &s(I ta:t/(at6ytas+-D

iegbl fyta lagI fet!og)arseog+&s(/lag(tm-D

try

^

HH Agcoda tma &assb(a lag(tm

e&b(a tmes/agcodaTa:t+e&b(a. lag. oiisat-D

HH Agcoda tma &assb(a

e&b(a tmes/agcodaTa:t+e&b(a. &s(. oiisat j

!ogstbgts/MEAGY"ASSBKAY6ETY4AGKTM-D

P

cbtcm +A:ca$teog a-

^

tmrow gaw

Sta(bgo(rb$myA:ca$teog+"assb(a!ogstbgts/AG!OEGKYAVVOVYKAGAVB4. a-D

P

rat%rg e&b(aD

#1


86/95


P

HXX

X !og)arts tma (e)ag g%&far to brrby oi fytas

X

X $brb& e

X Tma g%&far to fa cog)artad

X rat%rg Tma fyta brrby ra$rasagteg( tma g%&far

XH

$re)bta fytaI fet!og)arseog+iegbl egt e-

^

iegbl fyta fyta= +fyta- ++e * J:>>JJJJJJ- RRR ;5-D

iegbl fyta fyta; +fyta- ++e * J:JJ>>JJJJ- RRR 9>JJ- RRR 7-D

iegbl fyta fytaJ +fyta- ++e * J:JJJJJJ>>--D

rat%rg +gaw fytaI

^ fyta=. fyta;. fyta9. fytaJ P-D

P

HXX


X



X $brb& bddeteog

#!


87/95



X $brb& oiisat




XH

$re)bta 6%iiaradE&b(a agcodaTa:t+iegbl 6%iiaradE&b(a e&b(a. iegbl fytaI

bddeteog. iegbl egt oiisat-


^

HH Kats tma e&b(a de&agseogs


iegbl egt wedtm e&b(a/(at3edtm+-D




4o(/egio+3edtm j wedtm-D

4o(/egio+Mae(mt j mae(mt-D

ei ++wedtm X mae(mt- R +bddeteog/lag(tm X 7 j oiisat--

^

HH Etarbtas o)ar bll &assb(as fytas

ior +iegbl fyta bdd bddeteog-

#"


88/95


89/95


P

P

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alsa

^

tmrow gaw

Sta(bgo(rb$myA:ca$teog+"assb(a!ogstbgts/AG!OEGKYAVVOVY6EKY"ASSBKA

-D

P

rat%rg e&b(aD

P

HXX



X

X $brb& e&b(a

X Tma e&b(a to fa dacodad




XH

$re)bta fytaI dacodaTa:t+iegbl 6%iiaradE&b(a e&b(a. iegbl egt stbrteg(Oiisat-

^

#$


90/95


HH EgetebleFa stbrteg( )brebflas


iegbl egt oiisat stbrteg(Oiisat j

!ogstbgts/MEAGY"ASSBKAY6ETY4AGKTMD

egt lag(tm JD

HH 4oo$ tmro%(m =; fytas oi dbtb to datar&ega ta:t lag(tm

ior +egt e stbrteg(OiisatD e oiisatD jje-

^

iegbl egt m e H mae(mtD

iegbl egt w e Q mae(mtD

iegbl egt e&b(aNbl%a e&b(a/(atVK6+m. w-D

lag(tm +lag(tm 9- +e&b(aNbl%a * 9-D

P

4o(/egio+4AGKTM j lag(tm-D

fytaI ras%lt gaw fytaIlag(tmD




HH Etarbta iro& Faro to &assb(a lag(tm

$:


91/95


ior +egt lattar JD lattar lag(tmD jjlattar-

^

HH Etarbtas o)ar abcm fet ior tma meddag &assb(a


^

HH Kats tma fyta iro& tma e&b(a


HH !blc%lbtas tma fet ior tma &assb(a

ras%ltIlattar +fyta- ++ras%ltIlattar 9- +e&b(aNbl%a

* 9--D

ei +, +mae(mt 1 9--

^

jj,D

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^

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P

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rat%rg ras%ltD

$2


92/95


P

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$6


93/95


S!VAAG SMOT

MOHA

$3


94/95


BFOQT

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$


95/95


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Steganography ( hidden communication )

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Transcript of Steganography ( hidden communication )