US 8,028,332 B2Granted

Verification method of a target device connected to a master device

AssigneeNagravision S.A.

InventorsCorinne Le Buhan, Yishan Zhao

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Abstract

Example embodiments are directed to a revocation lists management method, namely a verification method of a target device connected to a master device, the master device having means to receive a content transmitted by a broadcast centre via a data stream, the master device and the target device authenticating themselves by the exchange of a certificate having at least one certificate identifier. The method includes transmitting by broadcast a target device verification table containing a certificate identifier list, storing certificate identifier list in the master device, extracting a verification data associated to the content, the verification data including the activation or the deactivation of the verification of the target device. If the verification data includes the activation of the verification, the method includes verifying the certificate of the target device by the master device using at least one list stored to authorize or prohibit the exchanges of data with the target device.

Claims19

Dependent claims

A verification method of a target device connected to a master device, the master device having means to receive a content transmitted by a broadcast centre via a data stream, the master device and the target device authenticating themselves by means of an exchange of a certificate including at least one certificate identifier, the verification method comprising:

requesting to the broadcast centre, by the master device, at least one certificate identifier list for the master device, the request including an identification of the master device;
determining an interface of the said master device by the broadcast centre,
preparing the certificate identifier list according to the interface;
transmitting to the master device updated rights and keys as well as the at least one certificate identifier list pertaining to the master device, in one or more EMM messages;
storing the at least one certificate identifier list on the master device;
and
extracting a verification indication associated with the content transmitted by the broadcast centre, the verification indication including activation or deactivation of a verification of the target device, wherein
when the verification indication includes the activation of the verification of the target device, the verification method further includes verifying a certificate of the target device by the master device and using the stored at least one certificate identifier list to authorize or prohibit an exchange of data with said target device.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/373,214Filed 13 Mar 2006
Priority: EP 0510844614 Sep 2005
Published: US 2007/0061875 A115 Mar 2007
Granted: 27 Sep 2011
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

H04N 21/2585
Management of client data: generation of a revocation list, e.g. of client devices involved in piracy acts
H04N 7/165
Authorising the user terminal, e.g. by paying; Registering the use of a subscription channel, e.g. billing: centralised control of user terminal ;…
H04N 21/25816
Management of client data: involving client authentication
H04N 21/43615
Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home: interfacing a…