Patent ID: 6078902
Filing Date: 2000-06-20
Classification: G06Q,G07F

Abstract:
A method for conducting transaction between first user and a remote second user interlinked through a communication network by utilizing also a clearing office interlinked to said network: the clearing office storing at least user privileged information; the method comprising:(a) the user and the clearing office establishing a cryptographic secured session, the user transmitting, via said session, at least user privileged information and transaction specific data;(b) the clearing office activating transaction validity checking procedure by utilizing at least said user privileged information or portion thereof and said transaction specific data or portion thereof;(c) in response to affirmative result of said transaction validity checking, the clearing office producing at least a transaction validity indication that is not being indicative of said first user privileged information; the clearing office and said first user establishing a communication session and the clearing office transmitting, via said session, at least said transaction validity indication;(d) the first user receiving, via said session, the transaction validity indication; the first user and the second user establishing a communication session and the first user transmitting, via said session, at least said transaction validity indication;(e) the second user and the clearing office establishing cryptographic secured session and the second user transmitting, via said session, at least said transaction validity indication;(f) the clearing office applying a second checking procedure, and in case of affirmative result sending at least an acknowledgement to the second user,whereby the first user privileged information is not accessible to the second user.