Chuck Frank Northern Kentucky University Applied Cryptography Chuck Frank Northern Kentucky University

CSC 382/682 Cryptography & Computer Security CSC 382 - Upper level undergraduates CSC 682 – MSCS students Cryptography is approximately 1/3 of the course

Why Cryptography? Powerful tool for keeping data and communications secure Cryptography properly applied lessen security threats.

Goals Students should be able to apply cryptography in the software they will develop. Students should be able to apply cryptography in the systems they will manage.

Incorporating Cryptography into Programs Reference: Garns & Somerfield, Professional Java Security, Wrox Press Java Cryptography Extension (JCE)

Java Cryptography Look at a variety of Java cryptography applications Assign several small Java programs including a network application

Incorporating Cryptography into Computer Systems Kaufman, Perlman, Speciner, Network Security, 2nd edition, Prentice Hall

Knowledge of Modern Cryptography Secret Key Cryptography Public Key Cryptography Hashing and Message Digests Protocols

Secret Key Cryptography What is it? Basic understanding of algorithms DES Triple-DES Rijndael

Public Key Cryptography What is it? Algorithms RSA Diffie Hellman

Hashes and Message Digest Why is useful? Basic understanding of algorithms MD5 SHA-1 Tripwire

Protocols SSL/TSL IPSec Used for e-commerce Public key for key exchange Secret key for encryption IPSec Use for VPNs

Mathematical Background Student have had 10 hours of calculus & discrete math Cover sufficient number theory Modular arithmetic & Euler’s theorem To understand RSA Generation of probable primes

Not Covered Classical, yet obsolete, ciphers History of cryptography Caesar, Vigenére History of cryptography