Title:
受信機への制御ワードの供給
Document Type and Number:
Japanese Patent JP5795709
Kind Code:
B2
Abstract:
A method and a system for providing control words to at least one a receiver are described wherein said receiver is associated with a secure module. The method comprises the steps of receiving at least part of a code book comprising code information for descrambling one or more service streams in a scrambled data stream sent to said receiver; providing a control word request associated with at least one crypto period in at least one of said service streams; and, in response to said control word request, generating on the basis of said code information at least one control word for descrambling data in said service stream and associated with said crypto period.
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Inventors:
Efbert Westerfeld
Herald Johann Deckel
Herald Johann Deckel
Application Number:
JP2010274552A
Publication Date:
October 14, 2015
Filing Date:
December 09, 2010
Export Citation:
Assignee:
Irdet Be Fee
International Classes:
H04L9/08
Domestic Patent References:
| JP2008072198A |
Foreign References:
| US20080137850 |
Attorney, Agent or Firm:
Yasuhiko Murayama
Masatake Shiga
Takashi Watanabe
Shinya Mitsuhiro
Masatake Shiga
Takashi Watanabe
Shinya Mitsuhiro