1				13
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3													14
4																			16
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5
							6
	12
	7
8
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						11

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 coded or encrypted text or data back into plaintext.

4. A cipher in which each letter in the plaintext is replaced by another letter or symbol according to a predetermined pattern.

5. The original message before it is encrypted or coded.

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

7. A cipher that uses multiple alphabets to encrypt a message.

8. The study of cryptographic systems in order to find weaknesses and break codes.

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

10. A cipher that rearranges the letters or symbols of a message without changing them.

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

Down

12. The encoded or coded message produced by a cipher.

13. The process of converting plaintext into coded language to ensure its confidentiality.

14. The number of places by which each letter in the plaintext is shifted in the Caesar Cipher.

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

16. A cipher that uses a single alphabet to encrypt a message.

17. A type of transposition cipher in which the plaintext is written diagonally on a criss-cross pattern.

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