Access method and device for public wireless network

Abstract

The invention provides an access method and device for a public wireless network. The method comprises the following steps that an authentication server respectively issues a first digital certificate and a second digital certificate to a mobile terminal and an AP; the mobile terminal generates a random code; after the AP receives the random code, the AP and the authentication server verify the random code according to the second digital certificate; after passing the verification, the authentication server signs and encrypts the random code; and the mobile terminal further decrypts and verifies the random code according to the first digital certificate in order to judge whether the current AP is trusted and determine whether to establish a connection with the AP. In the scheme of the invention, the mobile terminal, the authentication server and the AP verify the random code with the uncertain length and character, and the authentication server respectively distributes keys to the mobile terminal and the AP to verify the random code, so that a mechanism for access authentication of the public wireless network is changed, and the security and the reliability for access of the public wireless network are improved.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a public wireless network access method and device. Background technique [0002] At present, mobile phones supporting WIFI functions have been widely popularized. At the same time, WIFI coverage has been basically realized in major commercial buildings, airports, stations, buses and other public places. Some of these WIFI providers are telecom operators, and some are merchants themselves. Due to the lack of unified management of these WIFI hotspots, it is inevitable that some WIFI hotspots with bad intentions will be mixed in them. [0003] Existing WIFI hotspot access usually only involves two pieces of information, the hotspot name and the access password. Mobile terminal users establish a connection with the AP by searching for the hotspot and entering the password, and some free WIFI hotspots can even be accessed without a password. . [0004] In the existi...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a public wireless network access method and device to at least partly solve the problem of poor public wireless network access security

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