The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 26, 2011
Filed:
Nov. 07, 2007
Kenneth P. Laberteaux, Ann Arbor, MI (US);
Yih-chun HU, Urbana, IL (US);
Kenneth P. Laberteaux, Ann Arbor, MI (US);
Yih-Chun Hu, Urbana, IL (US);
Toyota Motor Engineering & Manufacturing North America, Inc., Erlanger, KY (US);
The Board of Trustees, University of Illinois at Urbana-Champaign, Champaign, IL (US);
Abstract
A method for exchanging messages containing reliable information between nodes in an ad hoc network, such as a vehicle ad hoc network. The method includes the steps of providing a public key for a PKI encrypted certificate authority signature to all nodes known to transmit reliable information. Each node transmits a signal containing node identification information and the PKI encrypted certificate authority signature associated with that node. Each node also receives like signals from other nodes and then decrypts the certificate authority signatures from the received signals by using the certificate authority public key to ascertain the authenticity of the received certificate authority signatures and the reliability of the received message. Thereafter, the nodes receive and accept messages with a TESLA encrypted signature only with nodes identified to have authentic certificate authority signatures until the occurrence of a subsequent predefined event, such as a new node in the network or the elapse of a predetermined time period.