US 8,037,269 B2Granted

Portable auxiliary storage device

AssigneePanasonic Corporation

InventorsSatoshi Okamoto, Taiho Nakazawa, Sadatoshi Chozui, Koichi Morioka

Life of this patent

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Abstract

Versatility of a memory card is improved by providing a memory card where data protection mode and normal mode can be selected at discretion. A portable auxiliary storage device includes a mode setting section, a mode detecting section and a memory access control section. The mode setting section allows a user to set a normal mode permitting reading data stored in a memory section or writing the data to the memory section without restriction and a data protection mode for restricting the reading or writing. The mode detecting section detects a mode set in the mode setting section. The memory access control section controls the read or write according to a state of the mode setting section detected by the mode detecting section.

Claims5

Dependent claims

A portable auxiliary storage device comprising:

a mode setting section for allowing a user to set a normal mode for permitting reading data stored in a memory section and writing the data to the memory section without restriction and a data protection mode for restricting the reading and writing;
a mode detecting section for detecting a mode set in the mode setting section;
and
a memory access control section for controlling the read and write according to a state of the mode setting section detected by the mode detecting section,
wherein the memory access control section stores the mode detected by the mode detecting section in the memory section and erases the data stored in the memory section when a mode change is made from the data protection mode to the normal mode by making a comparison with a previously stored mode.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/092,600Filed 7 Nov 2006
Priority: JP 2005-3219517 Nov 2005
Published: US 2009/0125683 A114 May 2009
Granted: 11 Oct 2011
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

G11C 7/24
Arrangements for writing information into, or reading information out from, a digital store: memory cell safety or protection circuits, e.g.…
G06F 12/1491
By checking the subject access rights: in a hierarchical protection system, e.g. privilege levels, memory rings
G06F 21/74
To assure secure computing or processing of information: operating in dual or compartmented mode, i.e. at least one secure mode
G06F 21/78
Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer: to…