Portable electronic device

Details Portable electronic device Portable electronic device

2004-12-08

2008-10-07

Song, Hosuk (Department: 2135)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

Having separate add-on board

C713S193000, C726S002000

Reexamination Certificate

active

07434066

ABSTRACT:
In a portable electronic device, pointer information used to access files which are divided into a plurality of record data areas is held for each logical channel, and when a file selection command which specifies a logical command is received from the exterior, access to the file is controlled based on pointer information corresponding to the logical channel specified by the file selection command.

REFERENCES:
patent: 5717956 (1998-02-01), Shinosaka et al.
patent: 5778071 (1998-07-01), Caputo et al.
patent: 0 614 159 (1994-09-01), None
patent: 2 333 630 (1999-07-01), None
patent: WO 96/28795 (1996-09-01), None
European Search Report dated Sep. 19, 2005 for Appln. No. 04028699.9-221.

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