SIM-based authentication method capable of supporting inter-AP fast handover
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United States of America Patent
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Nov 24, 2009
Grant Date -
Aug 11, 2005
app pub date -
Jul 6, 2004
filing date -
Feb 10, 2004
priority date (Note) -
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Abstract
The invention relates to a SIM-based authentication method capable of supporting inter-AP fast handover, which can decrease the number of authentication procedures without negatively influencing the security of the wireless LAN by establishing an encrypted channel for each mobile node and using method 1: an aggressive key pre-distribution and method 2: probe request triggering passive key pre-query technique, thereby reducing the time of inter-AP handover for the mobile node. Furthermore, a re-authentication procedure is started to update the key after the key is used for a long time so as to ensure that the key is safe, thereby effectively achieving a fast and safe wireless LAN environment.
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