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Suppose you want to prevent an attacker from finding a collision in a hash function. The attacker has enough computing power to calculate 240 hash values. You need to ensure that the attacker has only small chance of success but prefer the smallest acceptable output size. You have three possible output sizes to choose from. Which should you choose?

Suppose you want to prevent an attacker from finding a collision in a hash function. The attacker has enough computing power to calculate 240 hash values. You need to ensure that the attacker has only small chance of success but prefer the smallest acceptable output size. You have three possible output sizes to choose from. Which should you choose?

Database System Concepts
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
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Suppose you want to prevent an attacker from finding a collision in a hash function. The attacker has enough computing power to calculate 240 hash values. You need to ensure that the attacker has only small chance of success but prefer the smallest acceptable output size. You have three possible output sizes to choose from. Which should you choose? 128 bits O 64 bits 40 bits
Transcribed Image Text:Suppose you want to prevent an attacker from finding a collision in a hash function. The attacker has enough computing power to calculate 240 hash values. You need to ensure that the attacker has only small chance of success but prefer the smallest acceptable output size. You have three possible output sizes to choose from. Which should you choose? 128 bits O 64 bits 40 bits
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