TW200610307A - Method for securing a ciphered content transmitted by a broadcaster - Google Patents
Method for securing a ciphered content transmitted by a broadcasterInfo
- Publication number
- TW200610307A TW200610307A TW094106837A TW94106837A TW200610307A TW 200610307 A TW200610307 A TW 200610307A TW 094106837 A TW094106837 A TW 094106837A TW 94106837 A TW94106837 A TW 94106837A TW 200610307 A TW200610307 A TW 200610307A
- Authority
- TW
- Taiwan
- Prior art keywords
- key
- encryption
- encrypted
- security module
- mcw
- Prior art date
Links
Abstract
The aim of this invention is to propose a method to prevent the abusive use of conditional access data, particularly by means of security module clones whose security has been compromised. This aim is reached by a method for protecting an encrypted content by at least one encryption key and transmitted by a diffuser to at least one multimedia unit associated to a security module, a value allowing the determination of the encryption key(s) of these content also being transmitted to the multimedia unit by said diffuser, said security module comprising means to determine the encryption key on the basis of said value, this method comprising the following steps: - generation of a temporary encryption key (MCW), - encryption by the temporary key (MCW) of the value allowing the determination of the encryption keys (cw) of the content; - transmission of this encrypted value to said multimedia unit, - encryption and transmission of at least two cryptograms comprising the temporary key (MCW) encrypted by an authorization key (G), the first cryptogram being encrypted by a first authorization key pertaining to a first security module and the second cryptogram being encrypted by a second authorization key, which pertains to a group of security modules whose first security module is excluded.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH4052004 | 2004-03-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
TW200610307A true TW200610307A (en) | 2006-03-16 |
Family
ID=57807558
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW094106837A TW200610307A (en) | 2004-03-11 | 2005-03-07 | Method for securing a ciphered content transmitted by a broadcaster |
Country Status (1)
Country | Link |
---|---|
TW (1) | TW200610307A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI401583B (en) * | 2009-08-06 | 2013-07-11 | Phison Electronics Corp | Data scramble and reverse-scranble method, data processing method, and controller and storage system thereof |
-
2005
- 2005-03-07 TW TW094106837A patent/TW200610307A/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI401583B (en) * | 2009-08-06 | 2013-07-11 | Phison Electronics Corp | Data scramble and reverse-scranble method, data processing method, and controller and storage system thereof |
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