Positional information storage system and method , semiconductor memory, and program

A positional information storage system that stores pieces of positional information of a communication terminal apparatus carried by a user, and comprises a transmission apparatus, the communication terminal apparatus, a mobile semiconductor memory, and a verification apparatus, wherein

• the transmission apparatus transmits element information concerning a position of the communication terminal apparatus, to the communication terminal apparatus,
• the communication terminal apparatus receives and outputs the element information to the semiconductor memory being inserted therein,
• the semiconductor memory includes an information storage unit, which has an area for storing information, and a tamper-resistant module,
• the tamper-resistant module includes:
• a position management unit operable to generate positional information based on the received 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 semiconductor memory and verifies the read trail information using the trail information and the signature data.

A positional information storage system that stores pieces of positional information of a communication terminal apparatus carried by a user, and comprises a transmission apparatus, the communication terminal apparatus, a mobile semiconductor memory, and a verification apparatus, wherein

• the transmission apparatus transmits (i) element information concerning a position of the communication terminal apparatus and (ii) additional data which is generated by placing a digital signature on the element information, to the communication terminal apparatus,
• the communication terminal apparatus receives and outputs the element information and the additional data to the semiconductor memory being inserted therein,
• the semiconductor memory includes an information storage unit, which has an area for storing information, and a tamper-resistant module,
• the tamper-resistant module includes:
• a position management unit operable to, if having verified by checking the received additional data that the element information has not been tampered, generate positional information based on the received 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,
• the verification apparatus reads the trail information and the signature data from the information storage unit of the semiconductor memory and verifies the read trail information using the trail information and the signature data.

A mobile, tamper-resistant semiconductor memory being inserted in a communication terminal apparatus carried by a user and generating positional information of the communication terminal apparatus based on element information received from the communication terminal apparatus and storing the generated positional information, the semiconductor memory comprising:

• an information storage unit operable to store received information;
• a position management unit operable to receive the element information, which is related to a position of the communication terminal apparatus, from the communication terminal apparatus, and generate, based on the received element information, the positional information that indicates a position of the communication terminal apparatus;
• a time management unit operable to generate generation time information that indicates a time at which the positional information is generated;
• 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.

A positional information storage method, which, in a mobile, tamper-resistant semiconductor memory being inserted in a communication terminal apparatus carried by a user and having a storage area, stores pieces of positional information of the communication terminal apparatus into the storage area, the positional information storage method comprising:

• a position management step for acquiring element information, which is related to a position of the communication terminal apparatus, and generating, based on the acquired element information, the positional information that indicates a position of the communication terminal apparatus;
• a time management step for generating generation time information that indicates a time at which the positional information is generated;
• a signature generating step for generating 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 step for writing the trail information and the signature data as corresponding to each other into the storage area.

A program which is applied to a mobile, tamper-resistant semiconductor memory being inserted in a communication terminal apparatus carried by a user, and enables the semiconductor memory to store pieces of positional information of the communication terminal apparatus into a storage area provided in the semiconductor memory, the program comprising:

• a position management step for acquiring element information, which is related to a position of the communication terminal apparatus, and generating, based on the acquired element information, positional information that indicates a position of the communication terminal apparatus;
• a time management step for generating generation time information that indicates a time at which the positional information is generated;
• a signature generating step for generating 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 step for writing the trail information and the signature data as corresponding to each other into the storage area.