Memory device
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsYoshihiko Takagi, Takafumi Kikuchi
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Abstract
The present invention provides a memory device that can safely hold much data necessary for using an Application (AP) therein. In the present invention, a memory device includes a first tamper resistant memory 41 that cannot be accessed directly by an electronic device and a second non-tamper resistant memory that cannot be directly accessed by the electronic device. The second memory is used to save data stored in the first memory 41 to. In this memory device, since data necessary for using many APs can be safely held in the device, any terminal device satisfying authorizing conditions can use the data held therein.
Claims16
A memory device comprising:
- a first tamper resistant memory which cannot be accessed directly by an electronic device;
- and
- a second non-tamper resistant memory which cannot be directly accessed by the electronic device,
- wherein data stored in the first memory is saved to the second memory.
A memory device comprising:
- a tamper resistant module including an inner CPU and a first memory, to which external devices can not directly access;
- a non-tamper resistant memory including a second memory, to which external devices can not directly access;
- a control part for controlling access to the tamper resistant module and the non-tamper resistant memory from external devices;
- wherein said inner CPU is capable of directly accessing to both the first memory and the second memory, detects space areas of both the first memory and the second memory, and instructs to exchange necessary data to execute an application program between the first memory and the second memory in accordance with the detected space areas and/or command from an external device authenticated by the control part.
Dependencies are inferred from the claim text.