Importance

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Abstract

Cryptographic systems and methods that allow secure connection of two devices over an open network, using passwords communicated in an out-of-band process. One-time versus static passwords, active versus passive models of user participation, and different combinations of password-input and password-output mechanisms may be employed. The present invention uses either a password agreement protocol or a zero-knowledge password proof to securely establish a shared password and a shared key between two parties, and incorporates explicit steps to insure that the user(s) of the system authenticates that the same password, and thus the same key, is used at both devices.

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First Claim