6857 Computer and Network Security Lecture 3

Project Ideas ldquoaudio and securityrdquo possibilities

1 Cryptoanalysis by sound a httpwwwcstauacil~tromeracoustic

2 Cross-platform malware communicates with sound a Slashdot 103113

3 Company Illiri (see Slashdot 72313)

Today Encryption Perfect secrecy One-time Pad (OTP)

Readings (highly recommended) KatzLindell chapters 123

1

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ii JV

j $1

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1ieoreM OTP i (A VlCbV)ditl9 l _______ ----( e uv( ~~4~T C-Ie-S c~___-t~--- w~~

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5

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6

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____11____-K q~o IkL j2qd_ ii-ll n~1V ~ AIilL t~c)b

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8c~ - 10 lIDOmiddotmiddot It----~ 61 K= 000

7 b-~~(rIod- I ecc~ coi-)

110110middot ---------- shy

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-

ccedil

C-I

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I lsquoSI

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(~dt- ~P-~ ( M~Se~yOIPgt weclL ~+- 01) eVtph _10l

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ii JV

j $1

S -=vr~ec -ellVl 1itJ

1ieoreM OTP i (A VlCbV)ditl9 l _______ ----( e uv( ~~4~T C-Ie-S c~___-t~--- w~~

Co~ power J___-----________ CI~Q 1ftnttior)-~-eOIe~c-17 S-eCuv______

bull

5

itt One-Trne PA

i M= lsquoci IOU- (x-st srnrsquo) K to 10deg (soc A-bftrdquopdrdquo(keY)

lsquoLI- = i i i bull bull

lie K reDi IC iV Pec)J

LL tI_ iDIIOO

= re(kekrsquo) Meordquo= 11

OTP r4nr44vbn_veoahtc)y 4ecre Es

Can not break scirsquoenie1ersquoStn t trn rcck cckspAc1yotC

(Conpca to csnpu-tkraoI4 sccsee_ t npices assinng+rbn

4t amplsquoa kas Jk4 Ccrsquoptn ptrsquotr camp+ fJcr

j43t flwbrsquo42t3 lsquo)

lsquoveuml5 Ufl2rrZn Yc

lsquop (crdquoigraversquo) GJCbS lsquo0r rnesYaye 1

P (Mi1= vamps -nrsquo tL4 mt sM

ac- lwiirsquoj seen ccr-kik Crsquo

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bi 6 seek Crdquo

6

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I

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sit ~ s eco-e1 -I 5

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4

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MIT OpenCourseWarehttpocwmitedu

1HWZRUNDQGampRPSXWHU6HFXULWSpring 2014

For information about citing these materials or our Terms of Use visit httpocwmiteduterms

itt One-Trne PA

i M= lsquoci IOU- (x-st srnrsquo) K to 10deg (soc A-bftrdquopdrdquo(keY)

lsquoLI- = i i i bull bull

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LL tI_ iDIIOO

= re(kekrsquo) Meordquo= 11

OTP r4nr44vbn_veoahtc)y 4ecre Es

Can not break scirsquoenie1ersquoStn t trn rcck cckspAc1yotC

(Conpca to csnpu-tkraoI4 sccsee_ t npices assinng+rbn

4t amplsquoa kas Jk4 Ccrsquoptn ptrsquotr camp+ fJcr

j43t flwbrsquo42t3 lsquo)

lsquoveuml5 Ufl2rrZn Yc

lsquop (crdquoigraversquo) GJCbS lsquo0r rnesYaye 1

P (Mi1= vamps -nrsquo tL4 mt sM

ac- lwiirsquoj seen ccr-kik Crsquo

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bi 6 seek Crdquo

6

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OTP Jo~ f pViJ~ C1 Q~ertt4tb of-7

cs it

Me~$CIcye Grgtie~ Dr fttdn q~l~+ Ihodctb

( Qli)

I

lsquo3 C 3 bull iibull ~eeoe je s-ccreb

sit ~ s eco-e1 -I 5

_ C -j I 3

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bull

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bull avoId re-Il~4 ~ (jc Veno)t I- L tpound)C~ - (M1(pound)ltj(f) (Ma tf) K)

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MIT OpenCourseWarehttpocwmitedu

1HWZRUNDQGampRPSXWHU6HFXULWSpring 2014

For information about citing these materials or our Terms of Use visit httpocwmiteduterms

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51

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Me~$CIcye Grgtie~ Dr fttdn q~l~+ Ihodctb

( Qli)

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sit ~ s eco-e1 -I 5

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3

bull

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MIT OpenCourseWarehttpocwmitedu

1HWZRUNDQGampRPSXWHU6HFXULWSpring 2014

For information about citing these materials or our Terms of Use visit httpocwmiteduterms