ISAAC is a symmetric key, secret key, stream cipher designed in 1996 by Bob Jenkins. The name is an acronym for Indirection, Shift, Accumulate, Add, and Count.
ISAAC is one of a family of ciphers inspired by RC4. It is extremely fast on 32 bit word machines, taking about 19 operations to output each 32 bit pseudorandom word.
See also: cryptography, stream ciphers
