| 摘要 |
PROBLEM TO BE SOLVED: To enhance the anti-tamper performance by separating an encryption key of a communication device such as a mobile communication terminal from the communication device and storing the key with security. SOLUTION: An encryption key storage module consisting of a memory 1, a terminal 2 and a board 3 is mounted on a ring 4. The memory 1 mounted on the board stores an encryption key of a communication device. At the start of communication, the terminal 2 connects with a terminal of a mobile terminal to install the encryption key from a key storage module to the mobile terminal to conduct encryption communication. Or a coil can be provided in place of the terminal 2 to install the encryption key contactless. At the end of communication, the encryption key on the communication device such as the mobile terminal is erased. An article mounted always on a body such as a ring or a necklace stores the encryption key and the encryption key is installed through contact with the communication device or contactless only at the start of communication, then even when the communication device is stolen, the encryption key cannot be stolen and the ring being a storage medium of the encryption key is not stolen nor missing. |
