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1. The study of the frequency and distribution of letters or symbols in a text to help break a cipher.
2. The encoded or coded message produced by a cipher.
3. The process of converting plaintext into coded language to ensure its confidentiality.
4. A type of substitution cipher in which each letter in the plaintext is shifted a certain number of places down the alphabet.
5. A cipher that rearranges the letters or symbols of a message without changing them.
6. The number of places by which each letter in the plaintext is shifted in the Caesar Cipher.
7. The study of cryptographic systems in order to find weaknesses and break codes.
8. A polyalphabetic cipher that uses a keyword consisting of a repeating pattern of letters to encrypt a message.
9. A cipher that uses multiple alphabets to encrypt a message.
10. A type of transposition cipher in which the plaintext is written diagonally on a criss-cross pattern.
11. A cipher in which each letter in the plaintext is replaced by another letter or symbol according to a predetermined pattern.
12. An attack on a cipher by trying every possible key until the correct one is found.
13. A mathematical operator used to perform division with remainder, often denoted by the percent symbol (%).
14. A cipher that uses a single alphabet to encrypt a message.