Basic HTML version of Foils prepared May 30 99

Foil 13 Authentication with public key Cryptography

From Basic Mathematics of Security Systems CPS714 Computational Science Information Track -- June 2 99. by Geoffrey C. Fox
1 Here A chooses a challenge -- a random number r and can verify that B is at other end using solely public information!
2 A Sends x
3 Decrypt x with dB and send back challenge
4 A Encrypts r using eB to give x
5 Send r
6 Only B could have sent back r
7 Alice is A
8 Bob is B
9 eB is public key of B
10 dB is B's private key
in Table To:

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