Tokens/keys for wireless communications

US7532723B2 · kind B2 · utility

Assignee

• InterDigital Technology Corporation · US

Inventors

• Prabhakar R. Chitrapu · Blue Bell, US
• Alain Charles Briancon · Poolesville, US
• Akinlolu Oloruntosi Kumoluyi · Greenville, US
• Alan G. Carlton · Mineola, US
• Kiran K. Vanganuru · San Diego, US
• Richard Herschaft · Great Neck, US
• John E. Hoffmann · Indialantic, US
• John Thommana · Cedar Rapids, US
• Debashish Purkayastha · Lansdale, US
• Guodong Zhang · Syosset, US
• Robert L. Olesen · Huntington, US
• Alexander Reznik · Titusville, US
• Tiejun Shan · Plano, US
• Sung-Hyuk Shin · Northvale, US
• Amit Singhal · Piscataway, US

Key dates

• Filing date: Nov 23, 2004
• Grant date: May 12, 2009
• Expiry date: Nov 23, 2024

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04W88/02
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

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.