FR2863796B1 - Procede de securisation du dechiffrement de donnees chiffrees - Google Patents

Procede de securisation du dechiffrement de donnees chiffrees

Info

Publication number
FR2863796B1
FR2863796B1 FR0314512A FR0314512A FR2863796B1 FR 2863796 B1 FR2863796 B1 FR 2863796B1 FR 0314512 A FR0314512 A FR 0314512A FR 0314512 A FR0314512 A FR 0314512A FR 2863796 B1 FR2863796 B1 FR 2863796B1
Authority
FR
France
Prior art keywords
digitable
securing
recording
data
digitable data
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
FR0314512A
Other languages
English (en)
Other versions
FR2863796A1 (fr
Inventor
Herve Chabanne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sagem SA
Original Assignee
Sagem 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 Sagem SA filed Critical Sagem SA
Priority to FR0314512A priority Critical patent/FR2863796B1/fr
Priority to PCT/FR2004/003151 priority patent/WO2005067197A2/fr
Publication of FR2863796A1 publication Critical patent/FR2863796A1/fr
Application granted granted Critical
Publication of FR2863796B1 publication Critical patent/FR2863796B1/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/30—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy
    • H04L9/3066—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy involving algebraic varieties, e.g. elliptic or hyper-elliptic curves
    • H04L9/3073—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy involving algebraic varieties, e.g. elliptic or hyper-elliptic curves involving pairings, e.g. identity based encryption [IBE], bilinear mappings or bilinear pairings, e.g. Weil or Tate pairing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
    • H04N21/26606—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for generating or managing entitlement messages, e.g. Entitlement Control Message [ECM] or Entitlement Management Message [EMM]
    • H04N21/26609—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for generating or managing entitlement messages, e.g. Entitlement Control Message [ECM] or Entitlement Management Message [EMM] using retrofitting techniques, e.g. by re-encrypting the control words used for pre-encryption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/418—External card to be used in combination with the client device, e.g. for conditional access
    • H04N21/4181—External card to be used in combination with the client device, e.g. for conditional access for conditional access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/76—Proxy, i.e. using intermediary entity to perform cryptographic operations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
    • H04N7/1675—Providing digital key or authorisation information for generation or regeneration of the scrambling sequence
FR0314512A 2003-12-11 2003-12-11 Procede de securisation du dechiffrement de donnees chiffrees Expired - Fee Related FR2863796B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR0314512A FR2863796B1 (fr) 2003-12-11 2003-12-11 Procede de securisation du dechiffrement de donnees chiffrees
PCT/FR2004/003151 WO2005067197A2 (fr) 2003-12-11 2004-12-08 Procede de securisation du dechiffrement de donnees chiffrees

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0314512A FR2863796B1 (fr) 2003-12-11 2003-12-11 Procede de securisation du dechiffrement de donnees chiffrees

Publications (2)

Publication Number Publication Date
FR2863796A1 FR2863796A1 (fr) 2005-06-17
FR2863796B1 true FR2863796B1 (fr) 2006-02-17

Family

ID=34610569

Family Applications (1)

Application Number Title Priority Date Filing Date
FR0314512A Expired - Fee Related FR2863796B1 (fr) 2003-12-11 2003-12-11 Procede de securisation du dechiffrement de donnees chiffrees

Country Status (2)

Country Link
FR (1) FR2863796B1 (fr)
WO (1) WO2005067197A2 (fr)

Also Published As

Publication number Publication date
WO2005067197A3 (fr) 2006-06-22
FR2863796A1 (fr) 2005-06-17
WO2005067197A2 (fr) 2005-07-21

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Legal Events

Date Code Title Description
TP Transmission of property
TP Transmission of property
CD Change of name or company name
ST Notification of lapse

Effective date: 20120831