Further improvements are necessary for protecting the well-known trademark, in the aspects of the well-known trademark certificate mode, the certificate standard, the certificate institution, the applied scope and the doma.

Public Key Infrastructure and Certification Authorities (PKI/CA) have been used to support secure unclassified transactions over open networks, thus promoting e-commerce, e-government, and electronic transactions protection.

Research on PKI/CA System in Mobile Ad Hoc Networks;

Research on Certificate Authority Private Key Protection;

Design and Application of Minitype Certificate Authority Based on Open Source Code;

In this article,the meanin g of electronic signature is first defined,then the following aspects of electronic sig nature are analyzed:legal effect of electronic signature;the status,r esponsibilities and legal obligations of certificate authority;the relevant rules in Regulations of E -commerce in Guangdong Province.

This paper discusses the effect of breaking faith on forest certification,then shows that establishing certification body,training auditor and improving the supervision mechanism should focus on the faith.

The construction and application of OA System is the key method for certification body to improve its standard and efficiency,to fulfill its growing demand of certificating request.