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On-demand secure key generation in a vehicle-to-vehicle communication network

  • US 8,526,606 B2
  • Filed: 12/20/2010
  • Issued: 09/03/2013
  • Est. Priority Date: 12/20/2010
  • Status: Active Grant
First Claim
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1. A method of generating on-demand cryptographic keys in a vehicle-to-vehicle communication system comprising:

  • enabling a vehicle start operation for a host vehicle;

    obtaining at least one unique identifier relating to a user of the host vehicle;

    the host vehicle generating cryptographic keys for encrypting, decrypting, and authenticating secured messages between the host vehicle and at least one remote entity in the vehicle-to-vehicle communication system in response to enabling the vehicle start operation, the cryptographic keys being generated as a function of the at least one unique identifier, the cryptographic keys including a private cryptographic key and a public cryptographic key, wherein a plurality of unique identifiers are obtained corresponding to the user, wherein multiple hashes are obtained for each unique identifier using a one way function, and wherein a subset of the multiple hashes are selected for generating the private cryptographic key;

    temporarily storing a respective cryptographic key used to decrypt or encrypt messages communicated between the host vehicle and the at least one remote entity in a memory device of the host vehicle;

    enabling vehicle-to-vehicle communications with the at least one remote entity, wherein the host vehicle utilizes the respective cryptographic key to decrypt or encrypt a secure message transmitted between the host vehicle and the at the least one remote entity; and

    deleting the respective cryptographic key temporarily stored in the memory device of the host vehicle after the vehicle-to-vehicle communications of the host vehicle is disabled.

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