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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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How does Alice verify that a message M that was signed by Bob using RSA is really from Bob? Assume that eA and dA are the encryption and decryption exponents for Alice while eB and dB are those for Bob. The agreed upon hash function is h. All congruences are mod N and Alice has Bob's certificate.

Question 10 options:

	She compares h(M) to DS^dAmod N
	She compares h(M) to DS^dBmod N
	She compares h(M) to DS^eBmod N
	She compares h(M) to DS^eAmod N

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