An operation mode in cryptography for a block cipher such that each possible block of plaintext has a particular ciphertext value, as well as the reverse. Put another way, the same plaintext value will always result in the same ciphertext value. Electronic Code Book is used when a bulk of plaintext is broken down into several blocks of data. Each block is then encrypted independently of the other blocks so that it has the capability to support a different encryption key for each block type.
See Also: Cryptography or “Crypto.”
TechTarget. Electronic Code Book. [Online, July 26, 2001.] http:// searchsmallbizit.techtarget.com/gDefinition/0,294236,sid44_gci344944,00.html.