Patent Number: 7,822,205

Title: Multiple matching control method

Abstract: The aim of this invention is to pair a security module with one or more host apparatuses in an environment in which the host module has no connection with the management centre. This aim is achieved thanks to a pairing control method between a first device such as a removable security module and a second device such as a host apparatus, this pairing consisting in securing data exchanges with the aid of a unique pairing key, this method consisting in: verifying the pairing between the two devices and using the unique pairing key if the pairing has been already carried out, if not, searching for a free location among the locations reserved for the pairing data in the first device and in this case, initiating a pairing procedure by transmitting a cryptogram contained in the second device and that contains an identifier belonging to this device, this cryptogram being encrypted by a secret key common to all the first devices, decrypting this cryptogram using the first device and extracting from this cryptogram the identifier of the second device, generating a pairing key based on this identifier, storing in the first device the pairing data with the second device.

Inventors: Ksontini; Rached (Lausanne, CH), Sasselli; Marco (Chardonne, CH)

Assignee: Nagravision S.A.

International Classification: H04L 9/00 (20060101); H04L 29/06 (20060101); H04L 9/32 (20060101); H04L 9/08 (20060101); G06F 15/16 (20060101)

Expiration Date: 2018-10-26 0:00:00