Cryptography and Network Security Chapter 6 pptx

... Output FeedBack (OFB) Output FeedBack (OFB) Cryptography and Cryptography and Network Security Network Security Chapter 6 Chapter 6 Fourth Edition Fourth Edition by William Stallings by ... (i + 1) (mod 2 56) i = (i + 1) (mod 2 56) j = (j + S[i]) (mod 2 56) j = (j + S[i]) (mod 2 56) swap(S[i], S[j]) swap(S[i], S[j]) t = (S[i] + S[j]) (mod 2 56) t = (S[i] + S[j...

Ngày tải lên: 06/03/2014, 16:20

... E Km Km [ [ X X i-1 i-1 ] ] ANSI X9.17 PRG ANSI X9.17 PRG Cryptography and Cryptography and Network Security Network Security Chapter 7 Chapter 7 Fourth Edition Fourth Edition by William ... numbers” create “random numbers”  although are not truly random although are not truly random  can pass many tests of “randomness” can pass many tests of “randomness”  known as...

Ngày tải lên: 06/03/2014, 16:20

... 248 248 97 97 = 160 = 160 (Alice) (Alice)  K K AB AB = y = y A A x x B B mod 353 = mod 353 = 40 40 233 233 = 160 = 160 (Bob) (Bob) Cryptography and Cryptography and Network Security Network ... load in storing and processing keys and messages and processing keys and messages  an alternative is to use elliptic curves an alternative is to use elliptic...

Ngày tải lên: 15/03/2014, 17:20

... security detection, security audit trails, security recovery recovery 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 standard X.800 standard  security attacks, services, mechanisms security atta...

Ngày tải lên: 06/03/2014, 16:20

... 10 18 years 168 2 168 = 3.7 × 10 50 2 167 µs = 5.9 × 10 36 years 5.9 × 10 30 years 26 characters (permutation) 26! = 4 × 10 26 2 × 10 26 µs = 6. 4 × 10 12 years 6. 4 × 10 6 years Classical ... languages English Letter Frequencies English Letter Frequencies Cryptography and Cryptography and Network Security Network Security Chapter 2 Chapter...

Ngày tải lên: 06/03/2014, 16:20

... Remainder Theorem  Discrete Logarithms Discrete Logarithms Cryptography and Cryptography and Network Security Network Security Chapter 8 Chapter 8 Fourth Edition Fourth Edition by William ... 53 59 61 67 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...

Ngày tải lên: 06/03/2014, 16:20

...   e e =7 =7 7? 7? ( ( d d & & de= de= 1 mod 160 1 mod 160   d d < < 160 160 G G d=23 d=23   23 23 x x 7= 161 = 7= 161 = 10 10 x x 160 +1 160 +1 0? 0? 2 2 PU={7,187} PU={7,187} /? /? 3 3 PR={23, PR={23, 187}...

Ngày tải lên: 06/03/2014, 16:20

... Signature Digital Signature Algorithm Algorithm (DSA) (DSA) Cryptography and Cryptography and Network Security Network Security Chapter 13 Chapter 13 Fourth Edition Fourth Edition by William ... signature  with 512-1024 bit security with 512-1024 bit security  smaller and faster than RSA smaller and faster than RSA  a digital signature scheme only a digit...

Ngày tải lên: 15/03/2014, 17:20

Ngày tải lên: 22/03/2014, 14:20