cryptography
<cryptography >
The practise and study of encryption and decryption - encoding data so that it can only be decoded by specific individuals. A system for encrypting and decrypting data is a cryptosystem. These usually involve an algorithm for combining the original data ("plaintext") with one or more "keys" - numbers or strings of characters known only to the sender and/or recipient. The resulting output is known as "ciphertext". The security of a cryptosystem usually depends on the secrecy of (some of) the keys rather than with the supposed secrecy of the algorithm. A strong cryptosystem has a large range of possible keys so that it is not possible to just try all possible keys (a "brute force" approach). A strong cryptosystem will produce ciphertext which appears random to all standard statistical tests. A strong cryptosystem will resist all known previous methods for breaking codes ("cryptanalysis"). See also cryptology, public-key encryption, RSA. Usenet newsgroups: sci.crypt, sci.crypt.research. FAQ MIT . Cryptography glossary . RSA cryptography glossary . Cryptography, PGP, and Your Privacy .
Last updated: 2000年01月16日
Nearby terms:
Crypt Breakers Workbench ♦ cryptography ♦ CryptoLocker ♦ cryptology
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