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		14
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					9							15
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Across

1. A cryptanalytic technique that involves trying every possible key until the correct one is found. This is usually only feasible for small key sizes.

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

3. The process of recovering passwords from data that has been stored or transmitted in an encrypted or hashed form.

4. "A polyalphabetic cipher similar to the Vigenere Cipher, but using the plaintext itself as part of the key sequence in order to overcome a weakness observed in the original Vigenere Cipher."

5. A mathematical operation that finds the remainder when one integer is divided by another. The Vigenere Cipher uses this operator to perform its encryption and decryption operations.

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

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

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

9. A technique used to analyze and decipher encrypted messages by studying the frequency of occurrence of letters or symbols in the ciphertext.

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

11. A measure of the effectiveness of a password in resisting unauthorized access.

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

13. The study of analyzing and breaking encryption schemes

Down

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

15. The encrypted form of a plaintext message

16. A cryptanalytic technique used to try and discover the length of the keyword used in a Vigenere Cipher by detecting repeating patterns in the ciphertext.

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