1				12											15		16		17					19
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3
4
						13
5
10
6											14
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		11
	8
	9

Across

1. An attack on a cipher by trying every possible key until the correct one is found.

2. A mathematical operator used to perform division with remainder, often denoted by the percent symbol (%).

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

4. The practice of securing communication from unauthorized access.

5. A polyalphabetic cipher that uses a keyword consisting of a repeating pattern of letters to encrypt a message.

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

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

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

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

Down

10. A set of letters or symbols in a fixed order used to represent the basic sounds of a language.

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

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

13. The study of the frequency and distribution of letters or symbols in a text to help break a cipher.

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

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

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

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

18. A type of substitution cipher in which each letter in the plaintext is shifted a certain number of places down the alphabet.

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

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