Computer Security: Principles and Practice, 1/e

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Computationally Secure Algs‣ encryption is computationally secure if:• cost of breaking cipher exceeds info value• time required to break cipher exceeds theuseful lifetime of the info‣ usually very difficult to estimate theamount of effort required to break‣ can estimate time/cost of a brute-forceattack (see Ch 2)
FeistelCipherStructure
Page 1 and 2: Computer Security:Principles and Pr
Page 6 and 7: Block Cipher Structure‣ have a ge
Page 8 and 9: Triple DES (3DES)‣ first used in
Page 10 and 11: AES Round Structure
Page 12 and 13: Shift Rows‣ on encrypt left rotat
Page 14 and 15: Stream Ciphers‣ processes input e
Page 16 and 17: Modes of Operation‣ block ciphers
Page 18 and 19: Cipher Block Chaining (CBC)
Page 20 and 21: Counter (CTR)
Page 22 and 23: Key Distribution‣ symmetric crypt
Page 24: Summary‣ introduced symmetric enc

Computer Security: Principles and Practice, 1/e

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