Security key distribution using key rollover strategies for wireless networks
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United States of America Patent
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May 22, 2007
Grant Date -
Aug 14, 2003
app pub date -
Feb 14, 2002
filing date -
Feb 14, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Security key distribution techniques using key rollover strategies for wireless networks are described. A number of keys are generated, usually by an access point. The present invention allows a standard mode and a mixed mode. In standard mode, each device on the network supports automatic key updates. In mixed mode, one or more devices on the wireless network require fixed keys. In both modes, a predetermined number of keys are determined and communicated to client devices that are accessing the wireless network. The predetermined number is determined so that a client device can miss a certain number of authentication periods without losing communication with the wireless network. Preferably, transmit keys used by an access point are different than the transmit keys used by the client devices that support automatic key updates.
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