1. March 2005 1R. Smith - University of St Thomas - Minnesota QMCS 490 - Class Today Cryptography – introductory termsCryptography – introductory terms “Enigma” – a practical example“Enigma” – a practical example The quiz/surveyThe quiz/survey

2. March 2005 2R. Smith - University of St Thomas - Minnesota Crypto terms Plaintext, ciphertext, key, machine, algorithmPlaintext, ciphertext, key, machine, algorithm –Encryption, decryption Ciphertext only attackCiphertext only attack Known plaintext attackKnown plaintext attack Chosen plaintext attackChosen plaintext attack

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