Patent ID: 7865438
Filing Date: 2011-01-04
Classification: G06Q

Abstract:
1. A method of exchanging a first electronic value stored in a first user device, for a second electronic value stored in a second user device, the method comprising: transmitting, from the first user device, the first electronic value stored in the first user device and offer information; receiving the first electronic value and the offer information in the second user device; transmitting, from the second user device, the second electronic value stored in the second user device and agreement information, the agreement information includes agreement object information, session information, and an agreement electronic signature; receiving the second electronic value and the agreement information in the first user device; determining whether there is an abnormality in exchanging data between the first and second user devices; generating, after it is determined that there is an abnormality by said determining, a first electronic signature based on the session information and abnormality information; transmitting, after it is determined that there is an abnormality by said determining, abnormality request information to a third device to determine whether exchanging electronic values between the first and second user devices is to be aborted or committed, the abnormality request information includes the abnormality information, the session information, and the first electronic signature, and does not include control information, thereby information is transmitted to the third device without unnecessary control information; transmitting, after it is determined at the third device that the exchange of electronic values is to be aborted, from the third device information indicating that the exchange of electronic values is to be aborted; and transmitting, after it is determined at the third device that the exchange of electronic values is to be committed, from the third device information indicating that the exchange of electronic values is to be committed.