Title:
送信された情報をコピー保護するシステム及び方法
Document Type and Number:
Japanese Patent JP4698106
Kind Code:
B2
Abstract:
To afford copy protection for information, e.g. elementary streams, from a service provider while in transit between a point of deployment (POD) module and a set-top box, the information is accompanied by control information pairs. The pairs are respectively associated with the portions of the copy protected information and are incorporated into a shared key calculation in the POD module and set-top box. The shared keys are used by the POD module and set-top box to encrypt and decrypt the information. Tampering with a control information pair, as by an intruder or hacker, prevents keys shared by the set-top box and POD module from matching. A mismatch prevents the set-top box from correctly decrypting information received from the deployment module.
Inventors:
Ru, Jin
Freeman, martin
Freeman, martin
Application Number:
JP2001510238A
Publication Date:
June 08, 2011
Filing Date:
July 04, 2000
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
G06F12/14; H04L9/14; H04L9/08; H04N5/91; H04N5/913; H04N5/92; H04N7/16; H04N7/167
Foreign References:
| EP0763936A1 |
Other References:
臼木 直司 Naoshi Usuki,5C Digital Transmission Content Protection,映像情報メディア学会技術報告 Vol.22 No.65 ITEJ Technical Report,日本,社団法人映像情報メディア学会 The Institute of Image Information and Television Engineers,1998年11月,第22巻,p.37-42
JEFFREY A. BLOOM et.al.,Copy Protection for DVD Video,PROCEEDINGS OF THE IEEE,1999年 7月,VOL.87, NO.7,p.1267-1276,URL,http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.17.2277
JEFFREY A. BLOOM et.al.,Copy Protection for DVD Video,PROCEEDINGS OF THE IEEE,1999年 7月,VOL.87, NO.7,p.1267-1276,URL,http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.17.2277
Attorney, Agent or Firm:
Tadahiko Ito