DES Authentication
Data Encryption Standard (DS) authentication uses the DES and public key cryptography to authenticate both users and systems in the network. DES is a standard encryption mechanism; public key cryptography is a cipher system that involves two keys: one public and one private.
The security of DES authentication is based on a sender’s capability to encrypt the current time, which the receiver then can decrypt and check against its own clock. The timestamp is encrypted with DES. Two things are necessary for this scheme to work: The two agents must agree on the current time, and the sender and the receiver must be using the same encryption key.
If a network runs a time-synchronization program, the time on the client and the ...
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