Title:
DIGITAL CABLE TELEVISION BROADCAST RECEIVER
Document Type and Number:
WIPO Patent Application WO/2006/082812
Kind Code:
A1
Abstract:
It is possible to utilize limited reception software download by matching an IC card chip corresponding to a global platform technique to a digital cable television operation scheme. A limited reception software decryption unit (23) is provided in a global platform card manager (21) of the IC card chip (2). A decryption key unique to each of the limited reception software vendors and a key identification number corresponding to the decryption key are set in advance in the limited reception software decryption unit (23). Upon reception of the limited reception software (22) encrypted by the limited reception software vendor, the limited reception software decryption unit (23) performs decryption by using the decryption key specified by the key identification number.
Inventors:
YAMAGUCHI MASASHI
KITA TERUHIDE
DANNO TSUNEO
KITA TERUHIDE
DANNO TSUNEO
Application Number:
PCT/JP2006/301571
Publication Date:
August 10, 2006
Filing Date:
January 31, 2006
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD (JP)
YAMAGUCHI MASASHI
KITA TERUHIDE
DANNO TSUNEO
YAMAGUCHI MASASHI
KITA TERUHIDE
DANNO TSUNEO
International Classes:
G06F9/445; G06F11/00; H04L9/08; H04N5/00; H04N7/16
Foreign References:
| JP2001350728A | 2001-12-21 | |||
| JPH07245594A | 1995-09-19 | |||
| JPH08294109A | 1996-11-05 | |||
| JPH0877263A | 1996-03-22 | |||
| JP2004535730A | 2004-11-25 | |||
| JPH11146293A | 1999-05-28 | |||
| JP2002123496A | 2002-04-26 | |||
| JP2005269578A | 2005-09-29 |
Other References:
See also references of EP 1755340A4
Attorney, Agent or Firm:
Matsuda, Masamichi (1-3 Miyahara 5-chome, Yodogawa-ku, Osaka-sh, Osaka 03, JP)
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