ID-based control unit-key fob pairing

Patent metadata

Field	Value
Publication number	US-9516500-B2
Application number	US-201514858503-A
Country	US
Kind code	B2
Filing date	Sep 18, 2015
Priority date	Jul 17, 2012
Publication date	Dec 6, 2016
Grant date	Dec 6, 2016

Abstract

A method for pairing a key fob with a vehicle is provided. A pairing device and a key fob execute an ID authenticated key agreement protocol based on a KFID to authenticate one another and to generate an encryption key DHKey 1 . The pairing device encrypts a control unit identification (CUID) with DHKey 1 . The pairing device transmits the encrypted CUID to the key fob. The key fob and a control unit executes an ID authenticated key agreement protocol based on the CUID to authenticate one another and to generate an encryption key DHKey 2 . The control unit encrypts an operation key with DHKey 2 and transmits the encrypted operation key to the key fob.

First claim

What is claimed is:

1. A method for pairing a key fob with a vehicle, comprising:
executing, by a pairing device and the key fob, an identification (ID) authenticated key agreement protocol based on a key fob identification (KFID) to authenticate one another and to generate a first encryption key;
encrypting, by the pairing device, a control unit identification (CUID) with the first encryption key;
transmitting, by the pairing device, the encrypted CUID to a key fob;
executing, by the key fob and a control unit, an ID authenticated key agreement protocol based on the CUID to authenticate one another and to generate a second encryption key;
encrypting, by the control unit, an operation key with the second encryption key; and
transmitting, by the control unit, the encrypted operation key to the key fob.

2. The method of claim 1 , further comprising:
inserting the CUID into a storage device of the control unit; and
transmitting the CUID to a vehicle dealer.

3. The method of claim 1 , further comprising:
inserting a unique ID into the key fob (KFID).

4. The method of claim 1 , further comprising reading the KFID of the key fob.

Assignees

• Texas Instruments Inc

Inventors

• Ho Jin-Meng
• Peeters Eric

Classifications

• H04L63/061

  for key exchange, e.g. in peer-to-peer networks (cryptographic mechanisms or cryptographic arrangements for key agreement H04L9/0838) · CPC title

• H04L63/0428 Primary

  wherein the data content is protected, e.g. by encrypting or encapsulating the payload · CPC title

• G07C2009/00769

  with data transmission performed by wireless means · CPC title

• H04W12/04 Primary

  Key management, e.g. using generic bootstrapping architecture [GBA] · CPC title

• H04L2209/84

  Vehicles · CPC title