Date: Sat, 6 Apr 2013 13:42:15 -0700 (PDT) From: deepika dutta <deepikadutta_19@...oo.com> To: "john-dev@...ts.openwall.com" <john-dev@...ts.openwall.com> Subject: des-bs-doubt Hi, I want to know the reason behind using the following representation of key and plaintext in bitsliced des. For plaintext: Swapping the 32 bit halves before doing encryption though in the DES standard these halves are swapped after the last round. For key: Storing the 7 bits per byte in little endian form in DES_bs_all.K Is there any performance issue in this? If I want to swap the plaintext after last round and store the 7 bits per byte in big endian form in DES_bs_all.K, then will there be any problem in this representation? (of course I would have to change the indexes of B and K referred in sbox functions). Thanks, Deepika Content of type "text/html" skipped
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