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1. A cryptanalysis technique that involves analyzing the frequency of letters or characters in ciphertext to identify patterns
2. The original message before being encrypted by a cipher
3. The size or length of the key used by a cipher
4. The practice of analyzing and breaking codes and ciphers
5. Communication that is encrypted and protected from unauthorized access
6. The encrypted message produced by applying a cipher to plaintext
7. The total number of possible keys that can be used by a cipher
8. A cipher that encrypts a block of plaintext at a time and produces a corresponding block of ciphertext
9. The process of converting plaintext into ciphertext using a cipher
10. A pattern that moves in a back-and-forth motion like a zigzag
11. A cryptanalysis technique that involves trying every possible key to break a cipher
12. A transposition cipher that rearranges plaintext by writing it in a zigzag pattern over a predetermined number of rows before reading off the ciphertext from the columns.
13. A cipher that rearranges the order of the plaintext without changing the actual letters or characters
14. The process of converting ciphertext into plaintext using a cipher
15. A set of rules or steps that describe how to solve a problem or perform a task