Patent ID: 6718467
Filing Date: 2004-04-06
Classification: H04L

Abstract:
A method for a first participant to establish a shared secret with a second participant, said first participant and said second participant sharing a password-based first master key and a hash function, the method for said first participant comprising:sending a first message including a private value for said second participant and a first authenticator for said second participant encrypted with said first master key, said first message including a hash value of a first authenticator for said first participant encrypted with a first shared secret key, said first message including a first public value for said first participant; receiving a second message in response to said sending said first message, said second message including said first authenticator for said second participant and a first public value for said second participant encrypted with said first shared secret key; sending a third message in response to said receiving said second message, said third message including said first authenticator for said first participant, a hash value of a second authenticator for said first participant, a second authenticator for said second participant and a second master key encrypted with a second shared secret key, said third message including a second public value for said first participant; and receiving a fourth message in response to said sending said third message, said fourth message including a second authenticator for said second participant and a second public value for said second participant encrypted with said second shared secret key.