Computer Security: Principles and Practice, 1/e
Computer Security: Principles and Practice, 1/e
Computer Security: Principles and Practice, 1/e
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Triple DES (3DES)‣ first used in financial applications‣ in DES FIPS PUB 46-3 3 st<strong>and</strong>ard of 1999‣ uses three keys & three DES executions:C = E(K 3 , D(K 2 , E(K 1 , P)))‣ decryption same with keys reversed‣ use of decryption in second stage givescompatibility with original DES users‣ effective 168-bit key length, slow, secure‣ AES will eventually replace 3DES
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