The Pike stream cipher
was invented by Ross Anderson
to be a "leaner and meaner" version of FISH
after he broke FISH in 1994
(Of course it is a humorous allusion to the Pike (fish)
). PIKE combined ideas from A5
with the Lagged Fibonacci generators used in FISH. It is about 10% faster than FISH, yet believed to be much stronger. It potentially has a huge key length
, and in the nine years since publication there seem to have been no stronger attacks discovered.
"Red Pike" is also the name of a classified United Kingdom government cipher. Little is publicly known about Red Pike, except that it is a block cipher with a 64 bit block size and 64 bit key length, and internal operations similar to RC5.