METHOD AND SYSTEM FOR UPDATING AND USING DIGITAL CERTIFICATES

A method and system for updating and using a digital certificate, and the method comprises: a first terminal establishing a secure link with an access point and using the secure link to send a certificate updating request to the access point, where the certificate updating request includes a digital certificate to be updated which is currently used by the first terminal; and the access point sending the digital certificate to be updated to a local Authentication Service Unit which issues the certificate to be updated; and the local Authentication Service Unit which issues the digital certificate to be updated verifying the digital certificate to be updated, and after the digital certificate is verified to be valid, a local Authentication Service Unit corresponding to the access point generating a new digital certificate of the first terminal and sending the new digital certificate to the first terminal through the access point. A system for updating and using a digital certificate includes: a first terminal, an access point, a local Authentication Service Unit corresponding to the access point and a local Authentication Service Unit which issues a digital certificate to be updated. It can implement to establish the Ad hoc network communication between terminals which use different digital certificates by transforming the digital certificate formats, which improves the interoperability between terminals.