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shared-key cryptosystem

См. также в других словарях:

  • Public-key cryptography — In an asymmetric key encryption scheme, anyone can encrypt messages using the public key, but only the holder of the paired private key can decrypt. Security depends on the secrecy of that private key …   Wikipedia

  • Symmetric-key algorithm — Symmetric key algorithms are a class of algorithms for cryptography that use trivially related, often identical, cryptographic keys for both decryption and encryption.The encryption key is trivially related to the decryption key, in that they may …   Wikipedia

  • Cramer–Shoup cryptosystem — The Cramer–Shoup system is an asymmetric key encryption algorithm, and was the first efficient scheme proven to be secure against adaptive chosen ciphertext attack using standard cryptographic assumptions. Its security is based on the… …   Wikipedia

  • Cramer-Shoup cryptosystem — The Cramer Shoup system is an asymmetric key encryption algorithm, and was the first efficient scheme proven to be secure against adaptive chosen ciphertext attack using standard cryptographic assumptions. Its security is based on the… …   Wikipedia

  • Threshold cryptosystem — In cryptography, a cryptosystem is called a threshold cryptosystem , if in order to decrypt an encrypted message a number of parties exceeding a threshold is required to cooperate in the decryption protocol. The message is encrypted using a… …   Wikipedia

  • cryptology — cryptologist, n. cryptologic /krip tl oj ik/, cryptological, adj. /krip tol euh jee/, n. 1. cryptography. 2. the science and study of cryptanalysis and cryptography. [1635 45; < NL cryptologia. See CRYPTO , LOGY] * * * Introduction …   Universalium

  • Automated Teller Machine Communication Security — Automated Teller Machines were first used in 1939. Nowadays, about 1.5 million are installed worldwide [ [http://www.atmmarketplace.com/news story 24706.htm Number of ATMs worldwide expected to hit 1.5 million in December 2005] www.atmmarketplace …   Wikipedia

  • Ciphertext — The Zimmermann Telegram (as it was sent from Washington to Mexico) encrypted as ciphertext. This article is about encrypted information. For an overview of cryptographic technology in general, see Cryptography. In cryptography, ciphertext (or… …   Wikipedia

  • ElGamal signature scheme — The ElGamal signature scheme is a digital signature scheme which is based on the difficulty of computing discrete logarithms. It was described by Taher ElGamal in 1984 (see T. ElGamal, A public key cryptosystem and a signature scheme based on… …   Wikipedia

  • Merkle's Puzzles — In cryptography, Merkle s Puzzles is an early construction for a public key cryptosystem, a protocol devised by Ralph Merkle in 1974 and published in 1978. It allows two parties to agree on a shared secret by exchanging messages, even if they… …   Wikipedia

  • CEILIDH — is a public key cryptosystem based on the discrete logarithm problem in algebraic torus. This idea was first introduced by Alice Silverberg and Karl Rubin in 2003. The main advantage of those schemes is the reduced size of the keys for the same… …   Wikipedia

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