cipher
algorithm for encrypting and decrypting information
grille
class of ciphers
Bacon's cipher
steganography method
Product cipher
type of cipher
running key cipher
type of polyalphabetic substitution cipher
Music cipher
musical algorithm for encrypting and decrypting information
Short Weather Cipher
Cipher
exponential cipher
type of polygraphic cipher based on modular exponentiation
Password Authentication Protocol
password-based authentication protocol used by PPP or RADIUS
block cipher
cipher that works on fixed-size blocks of bits
stream cipher
symmetric key cipher where plaintext digits are combined with a pseudorandom cipher digit stream
broken cipher
cipher which admits a cryptographic attack significantly below its intended security level
two-square cipher
Encryption technique
Rambutan
family of encryption technologies designed by the Communications-Electronics Security Group (CESG)
one-time pad
encryption technique utilizing a one-time pre-shared key at least as long as the encrypted message
four-square cipher
symmetric encryption cipher
substitution cipher
method of encoding by which units of plaintext are replaced with ciphertext, according to a fixed system; the "units" may be single letters (the most common), pairs of letters, triplets of letters, mixtures of the above, and so forth
Theban alphabet
writing system, first published in Johannes Trithemius's Polygraphia (1518); today sometimes used in modern Wicca
null encryption
choosing not to use encryption in a system where various encryption options are offered, for testing/debugging, or authentication-only communication
code
cipher that operates on semantic tokens, rather than individual symbols or fixed-size blocks
affine cipher
type of substitution cipher
Bifid cipher
type of cipher in cryptography
Nihilist cipher
manually operated symmetric encryption cipher
SAVILLE
classified National Security Agency Type 1 encryption algorithm
Alberti cipher
Cipher created in 1467 by Leon Battista Alberti
VIC cipher
cipher used by Soviet spy Reino Häyhänen
classical cipher
a type of cipher that was used historically but now has fallen, for the most part, into disuse. In contrast to modern cryptographic algorithms, most classical ciphers can be practically computed and solved by hand