|n.||1.||The act or art of writing in code or secret characters; also, secret characters, codes or ciphers, or messages written in a secret code.|
|2.||The science which studies methods for encoding messages so that they can be read only by a person who knows the secret information required for decoding, called the |
|Noun||1.||cryptography - the science of analyzing and deciphering codes and ciphers and cryptograms|
|2.||cryptography - act of writing in code or cipher|
|(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
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: news:sci.crypt, news:sci.crypt.research.
RSA cryptography glossary.
Cryptography, PGP, and Your Privacy.