Method and system of conditional access to ip services

Details Method and system of conditional access to ip services Method and system of conditional access to ip services

H - Electricity

04

L

H04L 9/32 (2006.01) H04L 29/06 (2006.01)

Patent

CA 2444435

A method for transmitting information (20) with an access control via a network (3) using IP-type protocol. According to the invention, upon transmission a first datagram (23) is scrambled; a header (24) is defined, said header comprising at least one item of data identifying the means of access control; said header is concatenated with the first scrambled datagram (23) in order to create a data block (26); the data block is encapsulated in a second IP datagram (30); the second IP datagram (30) is transmitted for reception via the network; the data block (26) is extracted from the datagram thus received; the header (24) is extracted (24); the first datagram (23) is de-scrambled if access to said data is authorized; and the de-scrambled data is delivered.

Procédé d'émission d'informations (20) avec contrôle d'accès à travers un réseau (3) utilisant un protocole du type IP. Selon l'invention, à l'émission: embrouiller un premier datagramme (23); définir un entête (24) comportant au moins une donnée identifiant les moyens de contrôle d'accès; concaténer cet entête (24) avec le premier datagramme embrouillé (23) pour créer un bloc de données (26); encapsuler le bloc de données (26) dans un deuxième datagramme IP (30); émettre ce deuxième datagramme IP (30) à travers le réseau à la réception: extraire le bloc de données (26) du datagramme reçu; extraire l'entête (24); désembrouiller le premier datagramme (23) si l'accès à ces données est autorisé; délivrer les données désembrouillées.

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