Definition of blowfish Blowfish

/blowˈfɪʃ/ - [blowfish] - blow•fish

We found 6 definitions of blowfish from 4 different sources.

What does blowfish mean?

WordNet

Noun Plural: blowfishes
blowfish - delicacy that is highly dangerous because of a potent nerve poison in ovaries and liver
		sea squab, puffer, pufferfish
		saltwater fish flesh of fish from the sea used as food
		globefish, blowfish, puffer, pufferfish delicacy that is highly dangerous because of a potent nerve poison in ovaries and liver
		fugu a blowfish highly prized as a delicacy in Japan but highly dangerous because the skin and organs are poisonous
blowfish - any of numerous marine fishes whose elongated spiny body can inflate itself with water or air to form a globe; several species contain a potent nerve poison; closely related to spiny puffers
		puffer, pufferfish, globefish
		plectognath, plectognath fish tropical marine fishes having the teeth fused into a beak and thick skin covered with bony plates or spines
		family tetraodontidae, tetraodontidae puffers

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Wiktionary

blowfish (Noun)
Any species of fish of the family Tetraodontidae that have the ability to inflate themselves to a globe several times their normal size by swallowing water or air when threatened.
blowfish (Noun)
A delicacy popular in Japan served raw as sushi that may, if improperly prepared, contain deadly levels of neurotoxins.

Wikipedia

cipher
In cryptography, Blowfish is a keyed, symmetric block cipher, made in 1993 by Bruce Schneier and since 1993 has been included(put together) in a large number of encryption products. Blowfish has a good encryption rate in software and until 2008 no cryptanalytic attack model of it has been found. However, the AES block cipher algorithm now has more attention.

Schneier made Blowfish as a general-purpose algorithm, to be used as a replacement for the old DES algorithm and to get remove the problems and difficulties of other encryption algorithms. At the time Blowfish was released, many other algorithms were proprietary, or were secrets. Schneier has said that, "Blowfish is unpatented, and will remain so in all countries. The algorithm is hereby placed in the public domain, and can be freely used by anyone."

Main features of the design include key-dependent S-boxes and a very complex key schedule. Blowfish is one of the fastest block ciphers used by many people, except when changing keys. Each new key needs to be pre-processed which takes the same time as encrypting about 4 kilobytes of text, which is very slow compared to other block ciphers. This stops its use in certain applications (such as in the smallest embedded systems like the early smartcards), but it is not a problem in other applications. In one of the applications, it is actually good: the password-hashing method used in OpenBSD uses an algorithm that comes from Blowfish which makes use of the slow key schedule; the