Patent ID: 7023362

Claim:
A positional information storage system comprising: a transmission apparatus; a communication terminal apparatus; a mobile semiconductor memory including an information storage unit, which has an area for storing information and a tamper-resistant module; and a verification apparatus, wherein the transmission apparatus is operable to transmit element information concerning a position of the communication terminal apparatus, to the communication terminal apparatus, the communication terminal apparatus is operable to receive the element information from the transmission apparatus and output the element information to the mobile semiconductor memory, the tamper-resistant module of the mobile semiconductor memory includes: a position management unit operable to generate positional information based on the element information; a time acquiring unit operable to acquire generation time information that indicates a time related to the positional information; a signature generating unit operable to generate signature data by placing a digital signature on trail information that is composed of the generation time information and the positional information; and a writing unit operable to write the trail information and the signature data as corresponding to each other into the information storage unit, and the verification apparatus reads the trail information and the signature data from the information storage unit of the mobile semiconductor memory and verifies the trail information using the trail information and the signature data.