bit stream cipher

См. также в других словарях:

• Stream cipher attack — Stream ciphers, where plaintext bits are combined with a cipher bit stream by an exclusive or operation (xor), can be very secure if used properly. However they are vulnerable to attack if certain precautions are not followed:*keys must never be… …   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

• Stream-cipher — Stromverschlüsselung (engl. stream cipher) ist ein kryptographischer Algorithmus, bei dem Zeichen des Klartextes mit den Zeichen eines Schlüsselstroms einzeln (XOR bei nur zwei verschiedenen Zeichen) verknüpft werden. Der Schlüsselstrom ist eine… …   Deutsch Wikipedia

• Quick Stream Cipher — (QUISCI) ist ein für Software optimierter symmetrischer Stromchiffrierer, welcher zur Verschlüsselung von Daten geeignet ist. Er wurde 2001 von Stefan Müller (FGAN FHR) entwickelt. Inhaltsverzeichnis 1 Merkmale 2 Kern des Algorithmus 3 Sicherheit …   Deutsch Wikipedia

• Cipher — For other uses, see Cipher (disambiguation). Edward Larsson s rune cipher resembling that found on the Kensington Runestone. Also includes runically unrelated blackletter writing style and pigpen cipher. In cryptography, a cipher (or cypher) is… …   Wikipedia

• Bit-flipping attack — A bit flipping attack is an attack on a cryptographic cipher in which the attacker can change the ciphertext in such a way as to result in a predictable change of the plaintext, although the attacker is not able to learn the plaintext itself.… …   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

• Grain (cipher) — Grain is a stream cipher submitted to eSTREAM in 2004 by Martin Hell, Thomas Johansson and Willi Meier. It has been selected for the final eSTREAM portfolio for Profile 2 by the eSTREAM project. Grain is designed primarily for restricted hardware …   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

• Trivium (cipher) — Trivium is a synchronous stream cipher designed to provide a flexible trade off between speed and gate count in hardware, and reasonably efficient software implementation. It was submitted to the Profile II (hardware) of the eSTREAM competition… …   Wikipedia

• Rabbit (cipher) — Rabbit is a high speed stream cipher first presented [M. Boesgaard, M. Vesterager, T. Pedersen, J. Christiansen, O. Scavenius. Rabbit: A High Performance Stream Cipher. Proc. FSE 2003. Springer LNCS 2887, pp. 307 329 (… …   Wikipedia