ELECTRONIC WALLET

摘要

An efficient electronic wallet having local digital signature mechanism adapted to a ticket usable a plurality of times. The ticket is an electronic value object comprising a value attribute description section (800) representing the value, a service control section (803) for specifying a ticket examination, and a security information section (804) where a secret key specific to the object is stored. The service provider signs these sections. A variable attribute (802) of the value attribute description section (802) such as the number of remaining times is signed with the secret key. The number is decremented when the ticket is examined and re-signed with the secret key.