Cryptography and Network Security Chapter 8 doc

... TheoremDiscrete LogarithmsDiscrete Logarithms Cryptography and Cryptography and Network Security Network Security Chapter 8 Chapter 8 Fourth EditionFourth Editionby William Stallingsby ... 1 eg. 8 & 15 are relatively prime since factors of 8 are eg. 8 & 15 are relatively prime since factors of 8 are 1,2,4 ,8 and of 15 are 1,3,5,15 and 1 is the only 1,2,4 ,8 and of 15 ... 71 73 79 83 89 97 101 103 107 109 113 127 61 67 71 73 79 83 89 97 101 103 107 109 113 127 131 137 139 149 151 157 163 167 173 179 181 191 131 137 139 149 151 157 163 167 173 179 181 191 193...

Cryptography and Network Security Chapter 1 doc

... •computer, network, internet security computer, network, internet security X .80 0 standardX .80 0 standard security attacks, services, mechanisms security attacks, services, mechanismsmodels for network ... 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 ... Network Access Model for Network Access Security Security Cryptography and Cryptography and Network Security Network Security Chapter 1Chapter 1Fourth EditionFourth Editionby William...

Cryptography and Network SecurityChapter 9 doc

... En/Decryption;<&;<&M = 88 M = 88 5?5? 88 < 187 88 < 187 99&&C = 88 C = 88 77 mod 187 = 11 mod 187 = 11 &&M ... 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 ... 187 = 11 mod 187 = 11 &&M = 11M = 112323 mod 187 = 88 mod 187 = 88 ExponentiationExponentiation*<*<)4)444H5H5 8 899eg....

Cryptography and Network Security Chapter 2 pdf

... languages English Letter FrequenciesEnglish Letter Frequencies Cryptography and Cryptography and Network Security Network Security Chapter 2Chapter 2Fourth EditionFourth Editionby William ... 109231 µs = 35 .8 minutes2.15 milliseconds56256 = 7.2 × 1016255 µs = 1142 years10.01 hours1 28 21 28 = 3.4 × 10 38 2127 µs = 5.4 × 1024 years 5.4 × 10 18 years1 68 21 68 = 3.7 × 10502167 ... row and in the column letter in the same row and in the column of the other letter of the pairof the other letter of the pair Security of Playfair Cipher Security of Playfair Ciphersecurity...

Cryptography and Network Security Chapter 6 pptx

... standard allows any number of bit (1 ,8, 64 or standard allows any number of bit (1 ,8, 64 or 1 28 etc) to be feed back 1 28 etc) to be feed back denoted CFB-1, CFB -8, CFB-64, CFB-1 28 etc ... noisy channels Output FeedBack (OFB)Output FeedBack (OFB) Cryptography and Cryptography and Network Security Network Security Chapter 6Chapter 6Fourth EditionFourth Editionby William ... CFB-1 28 etc denoted CFB-1, CFB -8, CFB-64, CFB-1 28 etc most efficient to use all bits in block (64 or 1 28) most efficient to use all bits in block (64 or 1 28) CCii = P = Pii XOR DES...

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...

Cryptography and Network Security Chapter 10 pptx

... 353 = mod 353 = 4040233233 = 160 = 160(Bob)(Bob) Cryptography and Cryptography and Network Security Network Security Chapter 10Chapter 10Fourth EditionFourth Editionby William ... load in storing and processing keys and messages and processing keys and messagesan alternative is to use elliptic curvesan alternative is to use elliptic curvesoffers same security with ... 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 112 512 80 160 1024112 224 20 48 128...

Cryptography and Network Security Chapter 13 pot

... Signature Digital Signature Algorithm Algorithm (DSA)(DSA) Cryptography and Cryptography and Network Security Network Security Chapter 13Chapter 13Fourth EditionFourth Editionby William ... signaturewith 512-1024 bit security with 512-1024 bit security smaller and faster than RSAsmaller and faster than RSAa digital signature scheme onlya digital signature scheme only security depends ... sender:generates a random signature key generates a random signature key k, k<qk, k<q nb. nb. kk must be random, be destroyed after must be random, be destroyed after use, and never...

Cryptography and Network Security Block Cipher doc

... controversyCS595 -Cryptography and Network Security Cryptography and Network Security Block CipherXiang-Yang LiCS595 -Cryptography and Network Security Historyq IBM LUCIFER 60’sØ Uses 1 28 bits keyq ... Permutations2557174994113326 581 8501042234275919511143335 286 0205212444362961215313455373062225414466 38 3163235515477393264245616 488 40CS595 -Cryptography and Network Security Function fCS595 -Cryptography and Network Security Expansion Tableq Expands the 32 bit data to 48 bitsØ Result(i)=input( ... CS595 -Cryptography and Network Security DESCS595 -Cryptography and Network Security Initial and Final Permutationsq Inverse Permutations2557174994113326 581 8501042234275919511143335 286 0205212444362961215313455373062225414466 38 3163235515477393264245616 488 40CS595-Cryptography...

Cryptography and Network Security docx

... Wired and Wireless Networks, Kameswari Chebrolu and Bhaskaran Raman, 09-13 May 2005 Cryptography and Network Security Bhaskaran RamanDepartment of CSE, IIT KanpurReference: Whitfield Diffie and ... Phi(N) = 480 –Choose E = 7, then D = 343–If M = 2, Encryption: C = 1 28 –Decryption: D = CD mod N = 1 28 343 mod 527 = 2Fundamentals of Wired and Wireless Networks, Kameswari Chebrolu and Bhaskaran ... of Wired and Wireless Networks, Kameswari Chebrolu and Bhaskaran Raman, 09-13 May 2005 Security Guarantees●Two possibilities:–Unconditional–Computational security ●Unconditional security: ...

Xem thêm