strong cipher

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• Strong cryptography — or cryptographically strong are general terms applied cryptographic systems or components that are considered highly resistant to cryptanalysis. Demonstrating the resistance of any cryptographic scheme to attack is a complex matter, requiring… …   Wikipedia

• Cipher (newuniversal) — Not to be confused with Cipher (comics) or Cypher (comics). Cipher Cover to newuniversal: shockfront #2, Marvel Publishing, circa 2008. Publication information …   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

• Vigenère cipher — The Vigenère cipher is a method of encrypting alphabetic text by using a series of different Caesar ciphers based on the letters of a keyword. It is a simple form of polyalphabetic substitution.The Vigenère (pronEng|ˌviːdʒɪˈnɛəɹ, veedj ih nair )… …   Wikipedia

• Book cipher — A book cipher is a cipher in which the key is some aspect of a book or other piece of text; books being common and widely available in modern times, users of book ciphers take the position that the details of the key is sufficiently well hidden… …   Wikipedia

• Feistel cipher — In cryptography, a Feistel cipher is a symmetric structure used in the construction of block ciphers, named after the German IBM cryptographer Horst Feistel; it is also commonly known as a Feistel network. A large proportion of block ciphers use… …   Wikipedia

• Nihilist cipher — In the history of cryptography, the Nihilist cipher is a manually operated symmetric encryption cipher originally used by Russian Nihilists in the 1880s to organize terrorism against the czarist regime. The term is sometimes extended to several… …   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

• Rail Fence Cipher — The Rail Fence Cipher (also called a zigzag cipher) is a form of transposition cipher that derives its name from the way in which it is encoded.In the rail fence cipher, the plaintext is written downwards and diagonally on successive rails of an… …   Wikipedia

• Great Cipher — In the history of cryptography, the Great Cipher was a nomenclator cipher developed by the Rossignols, several generations of whom served the French Crown as cryptographers. It was excellent of its class and so was given this name; it was reputed …   Wikipedia

• Cryptographically strong — This term cryptographically strong is often used to describe an encryption algorithm, and implies, in comparison to some other algorithm (which is thus cryptographically weak), greater resistance to attack. But it can also be used to describe… …   Wikipedia