United States Patent 7,991,160
Guccione , et al. August 2, 2011
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Method and system for securing wireless communications
Abstract
A wireless transmit/receive unit (WTRU) and a Node B, respectively, perform joint randomness not shared by others (JRNSO) measurement to generate JRNSO bits based on a channel estimate between the WTRU and the Node B. The WTRU and the Node B then perform a reconciliation procedure to generate a common JRNSO bits. The Node B sends the common JRNSO bits to a serving network. The WTRU and the SN secure a session key (such as an integrity key, a cipher key and an anonymity key), using the common JRNSO bits. The JRNSO measurements are performed on an on-going basis, and the session key is updated using a new set of common JRNSO bits. The JRNSO bits may be expanded by using a pseudorandom number generator (PNG) or a windowing technique. A handover may be intentionally induced to increase the JRNSO bits generation rate.
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Inventors: Guccione; Louis J. (East Chester, NY), Cha; Inhyok (Yardley, PA), Reznik; Alexander (Titusville, NJ), Ye; Chunxuan (King of Prussia, PA), Racha; Renuka (Kings Park, NY)
Assignee: InterDigital Technology Corporation (Wilmington, DE)
Appl. No.: 11/736,830
Filed: April 18, 2007
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Related U.S. Patent Documents
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Application Number Filing Date Patent Number Issue Date
60792934 Apr., 2006
60829940 Oct., 2006
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Current U.S. Class: 380/270
Current International Class: H04K 1/00 (20060101)
Field of Search: 380/270
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