Title:
METHODS AND APPARATUS FOR SECURE DATA PROCESSING AND TRANSMISSION
Document Type and Number:
WIPO Patent Application WO2006052017
Kind Code:
A3
Abstract:
Methods and apparatus for placing a processing unit into one or more of a plurality of operational modes are disclosed wherein: the apparatus includes a local memory, a bus operable to carry information to and from the local memory, one or more arithmetic processing units operable to process data and operatively coupled to the local memory, and a security circuit operable to place the apparatus into the operational modes; and the plurality of operational modes includes a first mode whereby the apparatus and an external device may initiate a transfer of information into or out of the memory over the bus, a second mode whereby neither the apparatus nor the external device may initiate a transfer of information into or out of the memory over the bus, and a third mode whereby the apparatus may initiate a transfer of information into or out of the memory over the bus, but the external device may not initiate a transfer of information into or out of the memory over the bus.
Inventors:
SUZUOKI MASAKAZU (JP)
HATAKEYAMA AKIYUKI (JP)
HATAKEYAMA AKIYUKI (JP)
Application Number:
PCT/JP2005/021177
Publication Date:
August 24, 2006
Filing Date:
November 11, 2005
Export Citation:
Assignee:
SONY COMPUTER ENTERTAINMENT INC (JP)
International Classes:
G06F21/00
Domestic Patent References:
| WO2001005086A2 | 2001-01-18 |
Foreign References:
| EP0308219A2 | 1989-03-22 | |||
| EP1329787A2 | 2003-07-23 | |||
| US6708273B1 | 2004-03-16 | |||
| US20040003321A1 | 2004-01-01 | |||
| US6526491B2 | 2003-02-25 | |||
| US4633388A | 1986-12-30 |
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