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Across

1. A substitution cipher in which each letter is replaced with a single, fixed symbol throughout the ciphertext.

2. The practice of securing communication from unauthorized access.

3. The set of symbols used in a cipher to represent plaintext letters.

4. A substitution cipher in which the symbol used to replace a letter varies depending on its position in the plaintext.

5. A method of encoding information so that it can only be accessed by authorized parties.

6. A cipher that replaces each letter in the plaintext with a different letter, symbol, or number in the ciphertext.

7. The process of converting ciphertext back into plaintext using a cryptographic algorithm and a key.

8. A sequence of steps or instructions used to solve a problem or perform a task.

9. The original message or data that is to be encrypted.

10. The length of the key used in a cipher, typically measured in bits.

11. The process of converting plaintext into ciphertext using a cryptographic algorithm and a key.

12. The encrypted message or data that is the result of an encryption process.

Down

13. Also known as the Masonic Cipher, it is a substitution cipher used in cryptography that replaces letters with symbols and shapes.

14. A graphical representation used to represent something else, such as a letter or number in a cipher.

15. The process of analyzing encrypted information to decipher the original message or data.

16. The practice of using the same key repeatedly in a cipher.

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