InterDigital Inc (IDCC)

[Gamco]

United States Patent 7,532,723
Chitrapu , et al. May 12, 2009

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Tokens/keys for wireless communications


Abstract
Tokens/keys are produced for wireless communications. These tokens/keys are used for watermarks, signature insertion, encryption and other uses. In one embodiment, contextual information is used to generate tokens/keys. The tokens/keys may be derived directly from the contextual information. The contextual information may be used in conjunction with other information to derive the tokens/keys. Tokens/keys may be exchanged between transmit/receive units. The exchange of these tokens/keys may be encrypted.


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Inventors: Chitrapu; Prabhakar R. (Blue Bell, PA), Briancon; Alain Charles Louis (Poolesville, MD), Kumoluyi; Akinlolu Oloruntosi (Plainfield, NJ), Carlton; Alan Gerald (Mineola, NY), Vanganuru; Kiran Kumar S. (Vienna, VA), Herschaft; Richard Dan (Whitestone, NY), Hoffmann; John Erich (Indialantic, FL), Thommana; John (Austin, TX), Purkayastha; Debashish (Pottstown, PA), Zhang; Guodong (Farmingdale, NY), Olesen; Robert Lind (Huntington, NY), Reznik; Alexander (Titusville, NJ), Shan; TieJun (Upper Salford, PA), Shin; Sung-Hyuk (Northvale, NJ), Singhal; Amit (King of Prussia, PA)
Assignee: InterDigital Technology Corporation (Wilmington, DE)

Appl. No.: 10/996,493
Filed: November 23, 2004

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Related U.S. Patent Documents

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Application Number Filing Date Patent Number Issue Date
60545678 Feb., 2004
60536133 Jan., 2004
60524959 Nov., 2003


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Current U.S. Class: 380/44 ; 726/9
Current International Class: H04L 9/00 (20060101); G06F 7/58 (20060101)
Field of Search: 726/9 380/44