Math 187 Prof. Garsia (typed by Alex Brik) 04-06-2009
SAMPLE QUIZ 1 solution. 1. Let 1,2,3,.,n be an indexing of ciphertext letters. A Vigenere cipher with a 2 letter key will encryot every letter with index k 1 (mod 2) using rst letter of the key, and wi
Math 187 Prof. Garsia typed by Alex Brik 05-12-2009 Sample Quiz 6 Solution 1. YOU ARE DOING FINE 2.
A 010 B 00000 C 0001 D 001 E1 F 011 G 00001 Length = 670
1
4. H (X jY ) is bits of information learned when given the value of X , assuming that the value
Cryptography: An Introduction
(3rd Edition)
Nigel Smart
Preface To Third Edition
The third edition contains a number of new chapters, and various material has been moved
around.
The chapter on Stream Ciphers has been split into two. One chapter now deals