Patent ID: 8856554

Claim:
An information terminal comprising: a storage storing information; and at least one processor connected with the storage, to encrypt the information and decrypt the encrypted information using an encryption key, detect an interruption signal based on a position of the information terminal and a distance between the information terminal and a device, issue an instruction, to the storage, to delete the encryption key in response to detection of the interruption signal, report issuance of the instruction, and stop deletion of the encryption key by cancelling the instruction based on a response to the report issuance, wherein the storage includes a nonvolatile storage area and a volatile storage area, and the processor moves the encryption key from the nonvolatile storage area to the volatile storage area based on the instruction in a state where a power-supplying state of the storage is changed from a first power-supplying state to a second power-supplying state having a greater power supply capability than the first power-supplying state.