Patent ID: 8683229
Filing Date: 2014-03-25
Classification: A61B,H04L

Abstract:
1. A portable data encryption device, comprising: a storage; a primary cell including a power supply that is off in an initial state and that supplies power when switched on; a wireless communication circuit which receives a wireless activation signal from an external terminal, and, in an operation using electromotive force generated by the received activation signal when the power supply from the primary cell is off, receives an encryption key from the external terminal and stores the received encryption key in the storage; a switch which switches the power supply of the primary cell from off to on after the encryption key is stored in the storage by the wireless communication circuit; an encryption circuit which reads the encryption key from the storage, encrypts data using the read encryption key, and stores the encrypted data in the storage, the encryption circuit operating using the power supplied from the primary cell after the power supply from the primary cell is switched on; and a storage control unit configured to control access by the wireless communication circuit to the storage and access by the encryption circuit to the storage, wherein the storage control unit prohibits the wireless communication circuit from writing the encryption key in the storage, when the encryption circuit operates using the power supplied from the primary cell, and the switch switches the power supply from the primary cell one way from off to on.