An Introduction to Cryptology

Math 395:01 - Spring 2003

TF 2nd period in ARC 207 (Busch campus)

General Information

This is an upper level MATH course. It is directed at students in mathematics, electrical engineering, or computer science who have strong interest in mathematics and want to learn about the exciting applications of algebra and number theory to cryptography and cryptanalysis.

course syllabus and homework assignments


The formal prerequisites are Math 250 and any Math course whose number is greater than or equal to 300.
Part of the course will cover the needed background material on number theory (see below).
The enrollment is limited to 25 students (room size) and requires consent of the instructor.
Prospective students should:


Paul Garrett, Making, Breaking Codes; an introduction to Cryptology, Prentice-Hall, 2001.


As the title indicates, this is an introduction to modern cryptography. Topics to be covered include:

Symmetric Cryptography: Simple Ciphers and Cryptograms. Vigenère Cipher, Hill Cipher, Data Encryption Standard (DES), IDEA, Advanced Encryption Standard (AES).
Public Key/Private Key Cryptography: Ciphers: Rivest-Shamir-Adleman (RSA), El Gamal, Diffie-Hellman and trapdoors. Protocols: Kerberos, PGP, SSL, Digital Signatures.

Number Theory: Congruences. Finite fields, primitive roots and discrete logarithms. Finding large primes, pseudoprimes and primality testing. Square root algorithms, factoring techniques. Legendre and Jacobi symbols.

Last updated: October 28, 2002