Service provision system and communication terminal

A service provision system comprising:

• a service provision server;
• and
• a communication terminal capable of communicating with the service provision server over a network, the communication terminal including:
• a first memory unit arranged outside a block that is under security control, the first memory unit storing encrypted attribute information;
• a second memory unit arranged inside the block, the block having a higher security level than the first memory unit, the second memory unit storing an encryption key and biological information;
• an acquisition unit for acquiring the biological information on a living body from a captured image of a location of the living body, being arranged in the block;
• an encryption unit for encrypting user's attribute information on a service of the service provision server with the encryption key, being arranged in the block;
• a registration unit for registering the encrypted attribute information encrypted by the encryption unit into the first memory unit, and registering the biological information and the encryption key into the second memory unit, such that the biological information and encryption key are stored in the block having a higher security level that the first memory unit, the registration unit being arranged in the block;
• and
• a decryption unit for decrypting the encrypted attribute information registered in the first memory unit of the communication terminal with the encryption key registered in the second memory unit of the communication terminal if the biological information registered in the second memory unit of the communication terminal and biological information acquired by the acquisition unit of the communication terminal coincide with each other, the decryption unit being arranged in the block;
• and
• the service provision server including a provision processing unit for executing processing for providing its own service based on the attribute information decrypted by the decryption unit.