The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 24, 2009
Filed:
Jul. 06, 2004
Yu-ren Huang, Banciao, TW;
Jen-shun Yang, Sinjhuang, TW;
Chien-chao Tseng, Hsinchu, TW;
Jui-tang Wang, Keelung, TW;
Yu-Ren Huang, Banciao, TW;
Jen-Shun Yang, Sinjhuang, TW;
Chien-Chao Tseng, Hsinchu, TW;
Jui-Tang Wang, Keelung, TW;
Industrial Technology Research Institute, Chutung, Hsinchu, TW;
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.