The mathematical science used to secure the confidentiality, integrity, authentication, and non-repudiatio nof messages by use of codes, ciphers and cryptograms. Also the act or art of writing in codes or ciphers.
Procedures and protocols used to achieve (some of) these goals are known as cryptosystems.
Cryptography is divided largely into ConventionalCryptography and PublicKey cryptography.
See also:
Part of CategoryCryptography
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