TW200610307A - Method for securing a ciphered content transmitted by a broadcaster - Google Patents

Method for securing a ciphered content transmitted by a broadcaster

Info

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
Application number
TW094106837A
Other languages
Chinese (zh)
Inventor
Rached Ksontini
Henri Kudelski
Cedric Groux
Original Assignee
Nagracard Sa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nagracard Sa filed Critical Nagracard Sa
Publication of TW200610307A publication Critical patent/TW200610307A/en

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.
TW094106837A 2004-03-11 2005-03-07 Method for securing a ciphered content transmitted by a broadcaster TW200610307A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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