In cryptography, a key is a piece of information (a parameter) that determines the functional output of a cryptographic algorithm or cipher. Without a key, the algorithm would produce no useful result. In encryption, a key specifies the particular transformation of plaintext into ciphertext, or vice versa during decryption. Keys are also used in other cryptographic algorithms, such as digital signature schemes and message authentication codes.
Other articles related to "key, keys":
... To prevent a keyfrom being guessed, keysneed to be generated truly randomly and contain sufficient entropy ... of how to safely generate truly random keysis difficult, and has been addressed in many ways by various cryptographic systems ... or passphrase) is used as an encryption key well-designed cryptosystems first run it through a keyderivation function which adds a salt and compresses or expands it to the key ...
Famous quotes containing the word key:
“Sunshine of late afternoon
On the glass tray
a glass pitcher, the tumbler
turned down, by which
a key is lyingAnd the
immaculate white bed”
—William Carlos Williams (18831963)