A cryptography student has accidentally used the same keystream to encrypt two different messages, M¡ and M2. We know that the ciphertexts are C¡ = 0xbcc61793955b5eb5 and C2 = 0xdea2c2ƒd718d3b77. We also happen to know that M1 = 0x805d3a2029c0a386. a) What is M2 in hexadecimal? Please give your answer a leading Ox and use lowercase letters only. b) What is the keystream? Please give your answer a leading Ox and use lowercase letters only.
A cryptography student has accidentally used the same keystream to encrypt two different messages, M¡ and M2. We know that the ciphertexts are C¡ = 0xbcc61793955b5eb5 and C2 = 0xdea2c2ƒd718d3b77. We also happen to know that M1 = 0x805d3a2029c0a386. a) What is M2 in hexadecimal? Please give your answer a leading Ox and use lowercase letters only. b) What is the keystream? Please give your answer a leading Ox and use lowercase letters only.
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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A cryptography student has accidentally used the same keystream to encrypt two different messages, M, and M2. We know that the ciphertexts are CI = 0xbcc61793955b5eb5 and C2 = Oxdea2c2fd718d3b77. We also happen to know that = 0x805d3a2029c0a386.
a) What is M2 in hexadecimal? Please give your answer a leading Ox and use lowercase letters only. b) What is the keystream? Please give your answer a leading Ox and use lowercase letters only. Hint: These are all 8 byte numbers and will fit in an unsigned long type on most systems.
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