n a secure hash function? b. What is the role of a compression function in a hash function? c. Suppose H(m) is a collision-resistant hash func
n a secure hash function? b. What is the role of a compression function in a hash function? c. Suppose H(m) is a collision-resistant hash func
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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a. What characteristics are needed in a secure hash function?
b. What is the role of a compression function in a hash function?
c. Suppose H(m) is a collision-resistant hash function that maps a message of arbitrary bit length into an n-bit hash value. Is it true that, for all messages x, x’ with x ≠ x’, we have H(x) ≠ H(x’)? Explain your answer.
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