Traditional Symmetric Key Ciphers 1. For each part below, use the following plaintext message and show your work. Success a. What is the corresponding ciphertext if an auto-key cipher with a ki = 12 is used? b.What is the corresponding ciphertext if an Vigenere cipher with key = "life" is used? c.What is the corresponding ciphertext if a Playfair cipher with the following key is used? LGDBA QMHEC

Part 3: You intercept the ciphertext C = 10 sent to a user whose public key is e = 5, n = 35. What is the plaintext M. Show all your steps.

Decrypt: Encryption and decryption are mathematical inverses using the Caesar/Rail Fence Cipher Key is 0x7F in hexide

Decrypt this Rail Fence/Caesar Cipher MKBOCI IZX DKDY YQCZBSSK MZIR Hint: This a split key - one part of the key is used for the Caesar and the other part of the key is used for the Rail Fence. The full key (Caesar and Rail Fence], in hexidecimal, is: 0xAB. Decrypt message: The Caesar key, in decimal, is: The Rail Fence key, in decimal, is : Is the Caesar key a good random number? . Why? Why not?