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# Cryptography

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Cryptography (from the Greek language kryptós and gráphein, "to write") is the study of the principles and techniques by which information can be concealed in ciphers and later revealed by legitimate users employing the encryption key (see /Key?), but in which it is either impossible or computationally infeasible for an unauthorized person to do so.

  Cryptology -- Cryptanalysis

  /Hashfunction: MD5 -- SHA-1
  Public Key Cryptosystems (Asymmetric Algorithms): RSA -- Diffie-Hellman -- Elliptical Curve Cryptography
  Secret Key Cryptosystems (Symmetric Algorithms): Enigma -- One-time pad -- Data Encryption Standard (DES) -- RC4--Blowfish -- IDEA?-- Advanced Encryption Standard

  Terminology: /Key? -- Cipher -- Code

Further Reading:

- Schneier, Bruce - Applied Cryptography
- Schneier, Bruce - Secrets and Lies ISBN 0471253111 (Amazon, Pricescan)

Related topics:

Echelon

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Last edited August 2, 2001 5:04 am (diff)
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