De Seure, 1558Glossary
- Homophonic
- (Of a cipher) having multiple different symbols representing a single plaintext letter.
- Nomenclator
- A type of encryption that is a hybrid of a cipher (where text is encrypted letter by letter) and a code proper (where text is encrypted word by word).
- Null
- A sign used in a cipher that has no plaintext counterpart, used to create noise and put cryptanalysts off the scent.
- Cancellation operator
- A sign that instructs the recipient to ignore the previous character.
- Hapax legomenon
- (Usually) a word that is only found once in a corpus, such as Arepo.
- Cleartext
- Un-encrypted text found in a manuscript. Compare with plaintext.
- Plaintext
- The deciphered or not-yet-enciphered version of ciphertext.
- Witness
- An individual copy of a version of a text.
- Monoalphabetic substitution cipher
- The simplest form of cipher, in which a given letter is always represented by the same sign.