> For the complete documentation index, see [llms.txt](https://www.ctfrecipes.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.ctfrecipes.com/cryptography/mono-alphabetic-substitution/well-known-algorithms.md).

# Well known algorithms

- [Scytale](https://www.ctfrecipes.com/cryptography/mono-alphabetic-substitution/well-known-algorithms/scytale.md): Spartan cipher
- [ROT](https://www.ctfrecipes.com/cryptography/mono-alphabetic-substitution/well-known-algorithms/rot.md): Caesar & ROT13
- [Polybe](https://www.ctfrecipes.com/cryptography/mono-alphabetic-substitution/well-known-algorithms/polybe.md): Cipher square
- [Vigenere](https://www.ctfrecipes.com/cryptography/mono-alphabetic-substitution/well-known-algorithms/vigenere.md)
- [Pigpen cipher](https://www.ctfrecipes.com/cryptography/mono-alphabetic-substitution/well-known-algorithms/pigpen-cipher.md): Masonic cipher
- [Affine cipher](https://www.ctfrecipes.com/cryptography/mono-alphabetic-substitution/well-known-algorithms/affine-cipher.md)