ID-based control unit-key fob pairing
View Patent ↗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.
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.