Cryptography and Cryptanalysis in MATLAB by Marius Iulian Mihailescu & Stefania Loredana Nita

Author:Marius Iulian Mihailescu & Stefania Loredana Nita
Language: eng
Format: epub
ISBN: 9781484273340
Publisher: Apress

13.

W2 ← ((W20 + G15 + P) ≪ θ1, 15);

14.

for i = 0 to 15 do

15.

16.

Return (W2)

MD5 Function

In 1992, Rivest proposed a better version of MD4, called MD5. It was published under RFC 1321 Internet Standard [5]. Schematically speaking, MD5 is based on an “encryption function” e proposed by Davies-Meyer:

then

where the addition is done in modulo 232.

The encryption j(K, L) has four rounds and is described as follows:Message K has 128 bits and is arranged using a permutation (which depends on the round) into a word sequence, W1, W2, W3, W4

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