Block size = 4 bitsHash size = 4 bitsEncryption 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 2 bits; Plaintext and ciphertext are each 4 bits.g(H) = a 4-bit string that is equal to the complement of bits in H; For example, if H=A (Hexa) = 1010 (binary); then g(H)= 0101H0 = Initial hash = C (in Hexa)Given message M: D9 (in Hexa);a. Determine the hash (in hexadecimal) of the message M using Martyas-Meyer-Oseas hash function b. Determine the hash (in hexadecimal) of the message M using Davis-Meyer hash function c. Determine the hash (in hexadecimal) of the message M using Migayuchi-Preneel hash function

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Answered: Block size = 4 bits Hash size = 4 bits…

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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Block size = 4 bits
Hash size = 4 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 2 bits; Plaintext and ciphertext are each 4 bits.
g(H) = a 4-bit string that is equal to the complement of bits in H; For example, if H=A (Hexa) = 1010 (binary); then g(H)= 0101
H0 = Initial hash = C (in Hexa)
Given message M: D9 (in Hexa);

a. Determine the hash (in hexadecimal) of the message M using Martyas-Meyer-Oseas hash function

b. Determine the hash (in hexadecimal) of the message M using Davis-Meyer hash function

c. Determine the hash (in hexadecimal) of the message M using Migayuchi-Preneel hash function

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