Patent ID: 6742125
Filing Date: 2004-05-25
Classification: G06Q

Abstract:
A protocol for securely communicating a financial transaction between a customer and a merchant, a central authority having a central authority private key Ksca and assigning a customer account (CACCT) to said customer and a merchant account (MACCT) to said merchant, said customer having a customer public key Kpc, said merchant having a merchant public key Kpm, said protocol comprising the steps of:sending a quotation from said merchant to said customer, said quotation including said Kpm, a Ksca-signed signature that is a function of said MACCT, an unsigned copy of a price and a merchant private key (Ksm)-signed signature that is a function of said MACCT and said price; receiving an order in response to said quotation, said order including said Kpc, a Ksca-signed signature that is a function of said CACCT, an unsigned copy of said price and a customer private key (Ksc)-signed signature that is a function of said CACCT, said MACCT and said price; and replying to said order by filling said order.