YALE UNIVERSITY
DEPARTMENT OF COMPUTER SCIENCE
CPSC 467a: Cryptography and Computer Security
Professor M. J. Fischer
Handout #2
September 20, 2005
Problem Set 1
Due in class on Tuesday, September 27, 2005.
Work each of the following problems from the textbook,
Introduction to Cryptography with Coding Theory: Second Edition
by Trappe and Washington.. For each problem, show your work and
justify your answer, whether or not the question specifically requests
this.
Problem 1: Affine Cipher
Textbook, problem 2.13.2.
Problem 2: Vigenère Cipher
Textbook, problem 2.13.11.
Problem 3: Hill Cipher
Textbook, problem 2.13.13.
Problem 4: LFSR Machine
Textbook, problem 2.13.20.
Problem 5: Big Numbers
Textbook, problem 2.13.23.
Problem 6: Entropy
Textbook, problem 15.6.9.
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