Cryptography – Key management
Reexamination Certificate
2003-09-19
2010-10-26
Vu, Kimyen (Department: 2435)
Cryptography
Key management
C380S286000, C709S227000, C709S231000, C713S169000
Reexamination Certificate
active
07822205
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.
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Ksontini Rached
Sasselli Marco
Harness Dickey & Pierce PLC
Nagravision S.A.
Schwartz Darren
Vu Kimyen
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