Title:
セキュアなデータ処理とデータ伝送とを行う方法および装置
Document Type and Number:
Japanese Patent JP4756718
Kind Code:
B2
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:
Masakazu Suzuoki
Akiyuki Hatakeyama
Akiyuki Hatakeyama
Application Number:
JP2009147826A
Publication Date:
August 24, 2011
Filing Date:
June 22, 2009
Export Citation:
Assignee:
株式会社ソニー・コンピュータエンタテインメント
International Classes:
G06F12/14; G06F21/24
Domestic Patent References:
| JP2004280623A | ||||
| JP2002163239A | ||||
| JP2003280989A | ||||
| JP2003281071A | ||||
| JP2002287978A | ||||
| JP3411273B2 |
Foreign References:
| WO2003090052A1 |
Attorney, Agent or Firm:
Sakaki Morishita
Yusuke Murata
Tomoyuki Miki
Takeshi Aoki
Yusuke Murata
Tomoyuki Miki
Takeshi Aoki