Classical ciphers

Hill cipher

In classical cryptography, the Hill cipher is a polygraphic substitution cipher based on linear algebra. Invented by Lester S. Hill in 1929, it was the first polygraphic cipher in which it was practical (though barely) to operate on more than three symbols at once. The following discussion assumes an elementary knowledge of matrices. (Wikipedia).

Hill cipher
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Message Authentication Codes: Part 2

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Related pages

Confusion and diffusion | Vector space | Linear algebra | Twofish | Bifid cipher | Determinant | General linear group | Key (cryptography) | Meet-in-the-middle attack | Trifid cipher | Ciphertext | Polygraphic substitution | Known-plaintext attack | Key size | Prime number | Binary logarithm | Matrix (mathematics) | Invertible matrix | Playfair cipher | Modular arithmetic | Modular multiplicative inverse | Advanced Encryption Standard