Q2. Determine the hash (in hexadecimal) of the message M using Davis-Meyer hash function. GIVEN MESSAGE IS DAB9 NOT AB12 PLEASE SHOW HOW TO DO THE PROBLEM USING DAB9 • Block size = 8 bits • Hash size = 8 bits • Encryption function: Divide the key into two halves: LK and RK; Divide the plaintext into two halves: LT and RT; Then ciphertext= LC||RC where LC=LK XOR RT; and RC = RK XOR LT; where LC, RC, LT, and RT are each 4 bits; Plaintext and ciphertext are each 8 bits. • g(H) = an 8-bit string that is equal to the complement of bits in H; For example, if H=A3 (Hexa) = 10100011 (binary); then g(H)= 01011100 • H0 = Initial hash = F4
Q2. Determine the hash (in hexadecimal) of the message M using Davis-Meyer hash function. GIVEN MESSAGE IS DAB9 NOT AB12 PLEASE SHOW HOW TO DO THE PROBLEM USING DAB9 • Block size = 8 bits • Hash size = 8 bits • Encryption function: Divide the key into two halves: LK and RK; Divide the plaintext into two halves: LT and RT; Then ciphertext= LC||RC where LC=LK XOR RT; and RC = RK XOR LT; where LC, RC, LT, and RT are each 4 bits; Plaintext and ciphertext are each 8 bits. • g(H) = an 8-bit string that is equal to the complement of bits in H; For example, if H=A3 (Hexa) = 10100011 (binary); then g(H)= 01011100 • H0 = Initial hash = F4
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Q2. Determine the hash (in hexadecimal) of the message M using Davis-Meyer hash function.
GIVEN MESSAGE IS DAB9 NOT AB12 PLEASE SHOW HOW TO DO THE PROBLEM USING DAB9
• Block size = 8 bits
• Hash size = 8 bits
• Encryption function: Divide the key into two halves: LK and RK; Divide the plaintext into two
halves: LT and RT; Then ciphertext= LC||RC where LC=LK XOR RT; and RC = RK XOR LT;
where LC, RC, LT, and RT are each 4 bits; Plaintext and ciphertext are each 8 bits.
• g(H) = an 8-bit string that is equal to the complement of bits in H; For example, if H=A3 (Hexa)
= 10100011 (binary); then g(H)= 01011100
• H0 = Initial hash = F4
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