privatekey cryptography
<cryptography> As opposed to publickey cryptography, a cryptographic
method in which the same key is used to encrypt and decrypt the message.
Privatekey algorithms include the obsolescent Data Encryption Standard (DES),
tripleDES (3DES), the Advanced Encryption Standard (AES), also known as
Rijndael, Blowfish, Twofish RC2, RC4, RC5 and RC6.
A problem with privatekey cryptography is that the emitter and the recipient of
the message must agree secretly on a common key beforehands; but how can they do
so?
Publickey cryptography gives an answer to this problem.
(20030412)
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