Protection of a communication channel of a telecommunication device coupled to an NFC circuit against misrouting

摘要

A method for protecting data contained in a security module of a telecommunication device equipped with a near-field communication router and with a microcontroller, wherein data relative to the routing between the security module and gates of the router assigned to near-field communications are transmitted over a channel accessible by the router only, or by a control signal which is not generated by the microcontroller for the router.

主权项

1. A method to protect data stored in a security module of a telecommunication device equipped with a near-field communication (NFC) router and with a microcontroller, the method comprising:
providing a routing table, the routing table arranged to define communication pipes between the security module, the NFC router, and the microcontroller; defining a router administration pipe, the router administration pipe separate from the routing table and inaccessible to applications executed by the microcontroller; defining in the routing table a first pipe between the security module and the microcontroller; and passing a control signal directly from the NFC router to the security module, the control signal indicating that the NFC router is in proximity to an NFC reader, the control signal passed over the router administration pipe.