Data processing system, memory device, data processing unit,...

Details Data processing system, memory device, data processing unit,... Data processing system, memory device, data processing unit,...

2002-04-17

2008-08-05

Vu, Kimyen (Department: 2135)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S156000, C713S157000, C713S159000, C713S172000, C713S173000, C713S176000, C726S009000, C726S010000, C726S020000

Reexamination Certificate

active

07409554

ABSTRACT:
To provide an improved management structure of memory devices storing service-use applications. A card for a memory device applied to use various services is provided as one child card or more corresponding to each of the services, a parent card-stores data for child-card issue management, and the child-card issue processing is executed based on the parent card, such as parent card authentication. An issue certificate having a parent-card digital signature is stored in the child card, the issue certificate contains a service code and a child-card identification, and thus it becomes possible to confirm a service set in the child card based on the issue certificate as the parent-card signature data.

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