- ADFGX
- ADFGVX
- Affine
- Atbash
- Autokey
- Bacon
- Beaufort
- Bifid
- Columnar Transposition
- Double Columnar Transposition
- Four-square
- Gronsfeld
- Gudhayojya
- Kama-Sutra
- Monoalphabetic Substitution
- Morse Code
- Multiplicative
- Playfair
- ROT-47
- Running Key
- Sandorf's
- Scytale
- Shift
- Straddling Checkerboard
- Tap Code
- Trithemius
- Two-square
- Variant Beaufort
- Vatsyayana
- Vigenère
- XOR
- English
- Relative frequencies of letters
- Relative frequencies of first letters of words
- Relative frequencies of 2-grams of letters
All encodings supported by .NET.