This table summarizes which types of ciphers are used for which division and events. It also indicates which official rule corresponds to this usage. Blank boxes indicate that the cipher is not used for that division/category of event.
| Cipher | Type | Division A | Division B | Division C | ||
|---|---|---|---|---|---|---|
| Regional/Invitational | State/National | Regional/Invitational | State/National | |||
| PigPen/Masonic | Monoalphabetic Symbol | Decode | ||||
| Knights Templar | Monoalphabetic Symbol | Decode | ||||
| Tap Code | Monoalphabetic | Decode | ||||
| Standard Galactic Alphabet | Monoalphabetic Symbol | Decode | ||||
| Vigenère | Polyalphabetic | Decode | ||||
| Atbash | Monoalphabetic | Decode | Decode | |||
| 3.e.ix | ||||||
| Caesar | Monoalphabetic | Decode | Decode | |||
| 3.e.x. | ||||||
| Aristocrat Random, K1 | Monoalphabetic | Decode | Decode+Cryptanalysis | Decode+Cryptanalysis | ||
| Random Only | 3.e.i (1) | 3.e.i (1) | ||||
| Aristocrat K2, K3 | Monoalphabetic | Decode+Cryptanalysis | ||||
| 3.e.i (1) | ||||||
| Aristocrat Keyword | Monoalphabetic | Keyword | ||||
| 3.e.ii. | ||||||
| Patristocrat | Monoalphabetic | Decode+Cryptanalysis | Decode+Cryptanalysis | |||
| 3.e.i (2) | 3.e.i (2) | |||||
| Baconian | Steganography | Decode | Cryptanalysis | Cryptanalysis | ||
| 4 or fewer symbols | 3.e.ii. | 3.e.iii. | ||||
| Xenocrypt | Monoalphabetic Language | Decode+Cryptanalysis (0-1) | Decode+Cryptanalysis (1-2) | Decode+Cryptanalysis (0-2) | Decode+Cryptanalysis (2-3) | |
| 3.e.iii | 3.f.ii. | 3.e.iv | 3.f.ii. | |||
| Fractionated Morse | Tomogrammic | Decode+Cryptanalysis | Decode+Cryptanalysis | |||
| 3.e.iv. | 3.e.v. | |||||
| Cryptarithm (Base 10) | Monoalphabetic Math | Decode+Cryptanalysis | Decode+Cryptanalysis | |||
| 3.e.v. | 3.e.vi. | |||||
| Porta | Polyalphabetic | Decode | Cryptanalysis | Decode | Decode+Cryptanalysis | |
| 3.e.vi. | 3.f.iii. | 3.e.vii. | 3.f.iii. | |||
| Complete Columnar | Transposition | Cryptanalysis | Cryptanalysis | Cryptanalysis | ||
| 3.e.vii. | 3.e.viii. | 3.f.v. | ||||
| Nihilist Substitution | Polybius Square | Decode | Cryptanalysis | Decode | Decode+Cryptanalysis | |
| 3.e.viii. | 3.f.iv. | 3.e.ix. | 3.f.iv. | |||
| Checkerboard | Polybius Square | Decode | Decode+Cryptanalysis | Decode+Cryptanalysis | Decode+Cryptanalysis | |
| 3.e.xi | 3.f.v | 3.e.x | 3.f.vi | |||
| Homophonic | Monoalphabetic | Cryptanalysis | Cryptanalysis+Decode | Cryptanalysis | Cryptanalysis+Decode | |
| 3.e.xii. | 3.f.vi. | 3.e.xi. | 3.f.vii. | |||