1. CRYPTOLOGY BY: Chris and Chris

2. Concepts & Definitions c ryptology- Is the art,or would be science, of designing and braking down secrecy systems c ryptology- Is the art,or would be science, of designing and braking down secrecy systems Classical Cryptology -using codes and ciphers Codes-a fixed predetermined dictionary that assigns code words to most likely message. Ciphers-is a universal scheme employing a set of transformations capable of turning any plaintext into cipher text Symmetric Computer-Based Cryptology -a language where the sender and receiver has the same key. Public Key Cryptology -entrusts math itself with keys to a cryptosystem.

3. Concepts and Definitions cont. Plain text- The text that you enter Cipher text- the ciphered text that will be returned

4. Example Caesar Cipher-this is a shift cipher where the alphabet is shifted to provide a rule for substitution. Lnanvfgurorfg means Yana is the best

5. Progress Since the last presentation Chris^2 have started to work on our programming example.

6. References 1. Invitation to Cryptology By: Thomas H. Barr http://delivery.acm.org/10.1145/1280000/1272736/p20- raliszewski.pdf?key1=1272736&key2=8308353021&coll=ACM&dl=ACM&CFID=5585 5076&CFTOKEN=39898128 2. Cryptology in transition By: Abraham Lempel http://delivery.acm.org/10.1145/360000/356792/p285- lempel.pdf?key1=356792&key2=3428353021&coll=ACM&dl=ACM&CFID=5 5855076&CFTOKEN=39898128