Links to Sites on the Internet

• Rumkin’s Cipher Tools (for you, not your students)
• Narayan’s Affine Encoder (likewise)
• Practical Crypto: affine ciphers
• Affine Ciphers
• Practical Crypto: matrices
• Caesar Ciphers and beyond
• Vigenère (use the algebraic description, definitely not the giant 26-by-26 table!)

Larry’s Assignments (Classwork and Homework)

• Crypto 1: Substitution and Caesar Ciphers
• A cryptogram
• Crypto 2: From Caesar to Affine
• Crypto 3: Affine Ciphers and Modular Arithmetic
• Crypto 4: From Affine to Vigenère
• Additional Affine and Vigenère Practice
• Additional Matrix Cipher Practice
• Crypto 5: Matrix Ciphers
• Crypto 6: RSA, Part One
• Crypto 7: RSA, Part Two
• Crypto 8: RSA, Part Three
• Crypto 9: RSA, Part Four
• IRP Description and Topics