weak cipher

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• Weak key — In cryptography, a weak key is a key which when used with a specific cipher, makes the cipher behave in some undesirable way. Weak keys usually represent a very small fraction of the overall keyspace, which usually means that if one generates a… …   Wikipedia

• Cipher security summary — This article summarizes publicly known attacks against ciphers. Note that not all entries may be up to date. Table color key No known successful attacks Theoretical break Attack demonstrated in practice The Best attack column lists the complexity …   Wikipedia

• Purple (cipher machine) — This article is about the Japanese cipher Purple, also known as AN 1 (citation for AN 1 nomenclature for Purple?). For other Japanese ciphers, such as JN 25 which played a part in the Battle of Midway, see Japanese naval codes. In the history of… …   Wikipedia

• Blowfish (cipher) — Infobox block cipher name = Blowfish caption = The round function (Feistel function) of Blowfish designers = Bruce Schneier publish date = 1993 derived from = derived to = Twofish key size = 32 448 bits in steps of 8 bits; default 128 bits block… …   Wikipedia

• Stream cipher — The operation of the keystream generator in A5/1, a LFSR based stream cipher used to encrypt mobile phone conversations. In cryptography, a stream cipher is a symmetric key cipher where plaintext digits are combined with a pseudorandom cipher… …   Wikipedia

• DFC (cipher) — This article is about the block cipher. For other uses, see DFC (disambiguation). DFC General Designers Jacques Stern, Serge Vaudenay, et al. First published 1998 Related to COCONUT98 Cipher detail …   Wikipedia

• Substitution cipher — In cryptography, a substitution cipher is a method of encryption by which units of plaintext are replaced with ciphertext according to a regular system; the units may be single letters (the most common), pairs of letters, triplets of letters,… …   Wikipedia

• Block cipher modes of operation — This article is about cryptography. For method of operating , see modus operandi. In cryptography, modes of operation is the procedure of enabling the repeated and secure use of a block cipher under a single key.[1][2] A block cipher by itself… …   Wikipedia

• Akelarre (cipher) — Infobox block cipher name = Akelarre designers = G. Álvarez, D. de la Guía, F. Montoya, A. Peinado publish date = 1996 derived from = IDEA, RC5 derived to = related to = key size = 128 bits block size = 128 bits structure = Substitution… …   Wikipedia

• Block cipher — In cryptography, a block cipher is a symmetric key cipher operating on fixed length groups of bits, called blocks, with an unvarying transformation. A block cipher encryption algorithm might take (for example) a 128 bit block of plaintext as… …   Wikipedia

• Hasty Pudding cipher — Infobox block cipher name = Hasty Pudding Cipher caption = designers = Richard Schroeppel publish date = 1998 ndash;06 derived from = derived to = related to = certification = key size = Variable block size = Variable structure = rounds =… …   Wikipedia