Mustansiriyah University Cryptographic Hash Functions Course Overview
Explore the detailed structure and components of the SHA-512 algorithm taught in Mustansiriyah University's Faculty of Engineering, including message preparation, word expansion, compression functions, round structure, buffer register values, and constants used in SHA-512. Lectured by Fatimah Al-Ubaidy, this course delves into data security and computer engineering concepts crucial for third-year students.
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Mustansiriyah University Faculty of Engineering Cryptographic Hash Functions Course name: Data Security Computer Engineering Dep. SHA-512 Algorithm Lecturer: Fatimah Al-Ubaidy Class: Third Year SHA-512 Overall Structure Message Preparation (padding and length field): (|M| + |P| + 128) = 0 mod 1024 Where |M| is the length of original message and |P| the length of the padding field. The length of the padding field can be calculated as |P| = ( |M| 128) mod 1024 1
Mustansiriyah University Faculty of Engineering Cryptographic Hash Functions Course name: Data Security Computer Engineering Dep. SHA-512 Algorithm Lecturer: Fatimah Al-Ubaidy Class: Third Year Processing block and its digest as word Word Expansion: Wi is the processing word of the current round i 2
Mustansiriyah University Faculty of Engineering Cryptographic Hash Functions Course name: Data Security Computer Engineering Dep. SHA-512 Algorithm Lecturer: Fatimah Al-Ubaidy Class: Third Year SHA-512 Compression Function: Kiis a constant variable at round i where i =0,1 79. 3
Mustansiriyah University Faculty of Engineering Cryptographic Hash Functions Course name: Data Security Computer Engineering Dep. SHA-512 Algorithm Lecturer: Fatimah Al-Ubaidy Class: Third Year Structure of each round in SHA-512: A = T1 + T2 B = A C = B D = C E = D + T1 F = E G = F H = G T1 = H + conditional(E,F,G) + rotate(E) + Wi + Ki T2 = majority(A,B,C) + rotate(A) T1 T2 4
Mustansiriyah University Faculty of Engineering Cryptographic Hash Functions Course name: Data Security Computer Engineering Dep. SHA-512 Algorithm Lecturer: Fatimah Al-Ubaidy Class: Third Year The initial values of the buffer registers as 64-bit each a = 6A09E667F3BCC908 e = 510E527FADE682D1 b = BB67AE8584CAA73B f = 9B05688C2B3E6C1F c = 3C6EF372FE94F82B g = 1F83D9ABFB41BD6B d = A54FF53A5F1D36F1 h = 5BE0CD19137E2179 Eighty constants used for the eighty rounds in the SHA-512 5
