WAKE
Encyclopedia
In cryptography
, WAKE is a stream cipher
designed by David Wheeler in 1993.
WAKE stands for Word Auto Key Encryption. The cipher works in cipher feedback mode
, generating keystream
blocks from previous ciphertext
blocks. WAKE uses an S-box with 256 entries of 32-bit
words.
The cipher is fast, but vulnerable to chosen plaintext and chosen ciphertext attacks.
Cryptography
Cryptography is the practice and study of techniques for secure communication in the presence of third parties...
, WAKE is a stream cipher
Stream cipher
In cryptography, a stream cipher is a symmetric key cipher where plaintext digits are combined with a pseudorandom cipher digit stream . In a stream cipher the plaintext digits are encrypted one at a time, and the transformation of successive digits varies during the encryption...
designed by David Wheeler in 1993.
WAKE stands for Word Auto Key Encryption. The cipher works in cipher feedback mode
Block cipher modes of operation
In cryptography, modes of operation is the procedure of enabling the repeated and secure use of a block cipher under a single key.A block cipher by itself allows encryption only of a single data block of the cipher's block length. When targeting a variable-length message, the data must first be...
, generating keystream
Keystream
In cryptography, a keystream is a stream of random or pseudorandom characters that are combined with a plaintext message to produce an encrypted message ....
blocks from previous ciphertext
Ciphertext
In cryptography, ciphertext is the result of encryption performed on plaintext using an algorithm, called a cipher. Ciphertext is also known as encrypted or encoded information because it contains a form of the original plaintext that is unreadable by a human or computer without the proper cipher...
blocks. WAKE uses an S-box with 256 entries of 32-bit
Bit
A bit is the basic unit of information in computing and telecommunications; it is the amount of information stored by a digital device or other physical system that exists in one of two possible distinct states...
words.
The cipher is fast, but vulnerable to chosen plaintext and chosen ciphertext attacks.