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1 Suppose Alice's RSA modulus is ma = 91, her encryption exponent is eA = 7, and her decryption exponent is dA = 31. (a) Alice wants to sign the message x = 21. Calculate her signature.

1 Suppose Alice's RSA modulus is ma = 91, her encryption exponent is eA = 7, and her decryption exponent is dA = 31. (a) Alice wants to sign the message x = 21. Calculate her signature.

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
Problem 1PE
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Audrey EXERCISES 91, her encryption exponent is 1. Suppose Alice's RSA modulus is ma = eA = 7, and her decryption exponent is da = 31. (a) Alice wants to sign the message x = 21. Calculate her signature. sent; if u # v, the is unacceptable.
Transcribed Image Text:Audrey EXERCISES 91, her encryption exponent is 1. Suppose Alice's RSA modulus is ma = eA = 7, and her decryption exponent is da = 31. (a) Alice wants to sign the message x = 21. Calculate her signature. sent; if u # v, the is unacceptable.
313 he regard the pair as likely to be authentic, or does he know that %3D the pair has been altered? 2 Suppose that Alice's RSA parameters are those given in Exercise 1 and that Bob's RSA modulus is mB = 187. 13 and Alice wants to encrypt the (a) If Bob's public exponent is eB message-signature pair (x, o) = (70, 21), calculate her encrypted pair. %3D 37 and he receives the en- (b) If Bob's private exponent is dB ciphered message-signature pair (11, 69), what are the original plaintext and signature? Is this a valid message-signature pair? %3D
Transcribed Image Text:313 he regard the pair as likely to be authentic, or does he know that %3D the pair has been altered? 2 Suppose that Alice's RSA parameters are those given in Exercise 1 and that Bob's RSA modulus is mB = 187. 13 and Alice wants to encrypt the (a) If Bob's public exponent is eB message-signature pair (x, o) = (70, 21), calculate her encrypted pair. %3D 37 and he receives the en- (b) If Bob's private exponent is dB ciphered message-signature pair (11, 69), what are the original plaintext and signature? Is this a valid message-signature pair? %3D
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