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Cryptography and Network Security Chapter 2 pdf

Cryptography and Network Security Chapter 2 pdf

Cryptography and Network Security Chapter 2 pdf

... m n o p q r s t u v w x y z0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 then have Caesar cipher as:c ... decryptions/µs 32 2 32 = 4.3 × 109 2 31 µs = 35.8 minutes 2. 15 milliseconds56 2 56 = 7 .2 × 1016 2 55 µs = 11 42 years10.01 hours 128 2 128 = 3.4 × 1038 2 127 µs = 5.4 × 10 24 years 5.4 ... Letter FrequenciesEnglish Letter Frequencies Cryptography and Cryptography and Network Security Network Security Chapter 2 Chapter 2 Fourth EditionFourth Editionby William Stallingsby...
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Cryptography and Network Security Chapter 1 doc

Cryptography and Network Security Chapter 1 doc

... security detection, security audit trails, security recoveryrecovery Model for Network Security Model for Network Security Model for Network Security Model for Network Security using this ... •computer, network, internet security computer, network, internet security X.800 standardX.800 standard security attacks, services, mechanisms security attacks, services, mechanismsmodels for network ... Network Access Model for Network Access Security Security Cryptography and Cryptography and Network Security Network Security Chapter 1Chapter 1Fourth EditionFourth Editionby William...
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Cryptography and Network Security Chapter 6 pptx

Cryptography and Network Security Chapter 6 pptx

... noisy channels Output FeedBack (OFB)Output FeedBack (OFB) Cryptography and Cryptography and Network Security Network Security Chapter 6Chapter 6Fourth EditionFourth Editionby William ... = (i + 1) (mod 25 6)i = (i + 1) (mod 25 6)j = (j + S[i]) (mod 25 6)j = (j + S[i]) (mod 25 6)swap(S[i], S[j])swap(S[i], S[j])t = (S[i] + S[j]) (mod 25 6) t = (S[i] + S[j]) (mod 25 6) CCii ... i = 0 to 25 5 dofor i = 0 to 25 5 doS[i] = iS[i] = iT[i] = K[i mod keylen])T[i] = K[i mod keylen])j = 0j = 0for i = 0 to 25 5 do for i = 0 to 25 5 do j = (j + S[i] + T[i]) (mod 25 6) j =...
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Cryptography and Network Security Chapter 7 pptx

Cryptography and Network Security Chapter 7 pptx

... EKmKm[[XXi-1i-1]] ANSI X9.17 PRGANSI X9.17 PRG Cryptography and Cryptography and Network Security Network Security Chapter 7Chapter 7Fourth EditionFourth Editionby William ... numbers”create “random numbers”although are not truly randomalthough are not truly randomcan pass many tests of “randomness”can pass many tests of “randomness”known as “pseudorandom numbers”known ... distributioncontrolling key usagecontrolling key usage Random NumbersRandom Numbersmany uses of many uses of random numbersrandom numbers in cryptography in cryptography nonces in authentication...
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Cryptography and Network Security Chapter 8 doc

Cryptography and Network Security Chapter 8 doc

... factorizations and using least powers and using least powerseg. eg. 300300 =2 =2 11x3x311x5x5 2 2 18 =2 18 =2 11x3x3 2 2 hencehence GCD(18,300) =2 GCD(18,300) =2 11x3x311x5x500=6=6 ... 20 0 is: list of prime number less than 20 0 is: 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97 101 103 107 109 113 127 ... Remainder TheoremDiscrete LogarithmsDiscrete Logarithms Cryptography and Cryptography and Network Security Network Security Chapter 8Chapter 8Fourth EditionFourth Editionby William...
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Cryptography and Network SecurityChapter 9 doc

Cryptography and Network Security Chapter 9 doc

... x a) mod n f = (f x a) mod n return freturn f Cryptography and Cryptography and Network Security Network Security Chapter 9Chapter 9Fourth EditionFourth Editionby William ... d < < 160160GGd =23 d =23  23 23 xx7=161= 7=161= 1010xx160+1160+10?0? 2  2 PU={7,187}PU={7,187}/?/?33PR= {23 ,PR= {23 ,187}187} ... LScurrently assume 1 024 -20 48 bit RSA is securecurrently assume 1 024 -20 48 bit RSA is secure•ensure p, q of similar size and matching other constraintsensure p, q of similar size and matching other...
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Cryptography and Network Security Chapter 10 pptx

Cryptography and Network Security Chapter 10 pptx

... Equivalent Security Equivalent Security Symmetric scheme(key size in bits)ECC-based scheme(size of n in bits)RSA/DSARSA/DSA(modulus size in bits)5656 1 12 5 12 80 160 1 024 1 12 224 20 48 128 25 6 ... yAAxxBB mod 353 = mod 353 = 4040 23 3 23 3 = 160 = 160(Bob)(Bob) Cryptography and Cryptography and Network Security Network Security Chapter 10Chapter 10Fourth EditionFourth ... prime q=353q=353 and and aa=3=3select random secret keys:select random secret keys:A chooses A chooses xxAA=97, =97, B chooses B chooses xxBB =23 3 =23 3compute respective...
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Cryptography and Network Security Chapter 13 pot

Cryptography and Network Security Chapter 13 pot

... (DSA)(DSA)creates a 320 bit signaturecreates a 320 bit signaturewith 5 12- 1 024 bit security with 5 12- 1 024 bit security smaller and faster than RSAsmaller and faster than RSAa digital ... choose a large prime p = 2 p = 2 LL •where L= 5 12 to 1 024 bits and is a multiple of 64where L= 5 12 to 1 024 bits and is a multiple of 64• and q is a prime factor of and q is a prime factor ... Signature Digital Signature Algorithm Algorithm (DSA)(DSA) Cryptography and Cryptography and Network Security Network Security Chapter 13Chapter 13Fourth EditionFourth Editionby William...
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Cryptography and network security principles and practice, 5th edition

Cryptography and network security principles and practice, 5th edition

... 59 27 34 2 42 10 50 18 58 26 33 1 41 9 49 17 57 25 (c) Expansion Permutation (E) 32 1 2 3 454 5 6 7 898 9 10 11 12 13 12 13 14 15 16 1716 17 18 19 20 21 20 21 22 23 24 25 24 25 26 27 28 29 28 ... 99e9b 723 0bae3b9e40 526 1d3 824 311a20 0bae3b9e 424 1564953 325 340136002c25 424 15649 18b3fa416 123 a2d0d0 426 2a1c 18b3fa41 9616fe237 021 f 120 b1c130611 9616fe23 67117cf281c10372a28 320 02b 67117cf2 c11bfc0990 429 2a380c341f03 ... 50 42 34 26 1810 2 59 51 43 35 27 19 11 3 60 52 44 3663 55 47 39 31 23 157 62 5446 38 3 022 14 6 61 53 45 37 29 21 13 5 28 20 12 4(c) Permuted Choice Two (PC -2) 14 17 11 24 1 5 3 28 15 621 1 023 1912...
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Tài liệu Cryptography and Network Security Principles and Practices, Fourth Edition ppt

Tài liệu Cryptography and Network Security Principles and Practices, Fourth Edition ppt

... 121 ]For p = 3 and n = 2, the 3 2 = 9 polynomials in the set are0 x 2x1 x + 1 2x + 1 2 x + 2 2x + 2 For p = 2 and n = 3, the 2 3 = 8 the polynomials in the set are0 x + 1x 2 + x1x 2 x 2 ... 4/16/ 128 6 /24 /1 92 8/ 32/ 256Plaintext block size(words/bytes/bits)4/16/ 128 4/16/ 128 4/16/ 128 Number of rounds 10 12 14Round key size (words/bytes/bits) 4/16/ 128 4/16/ 128 4/16/ 128 Expanded key ... you can go back and start with simplifiedAES. Cryptography and Network Security Principles and Practices, Fourth Edition111 / 526 Cryptography and Network Security Principles and Practices,...
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