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1 Caesar Cipher - Department of Computer Science, University of Oxford

Encryption Worksheets Stephen Drape, OUCL. ... Earlier we used the key \KEY" to encrypt \CRYPTOGRAPHY" to get \MVWZXMQVYZLW". What key word would turn the ciphertext back into the plaintext? Use Table 1 to help. (b) Now work out the keys to reverse the other ciphertexts. (c) [Very Hard!] Here is some text that has been encrypted: