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Slide 6 of 13
Public-Key Authentication
- Alice selects a random number RA, sends to Bob EB(A, RA)
- Bob selects a random number RB, sends to Alice EA(RA, RB, KS)
- Alice sends to Bob (KS (RB)), confirming she has KS
- problem: how do you know somebody's public key? (man in the middle)