The sensor networks application domain continues to increase with the need for an effective security mechanism. The fact that WSN often deal with sensitive data operating in hostile and unexpected environments, makes the concept of security consi

:本文介绍了云计算应用的基本概况及云计算发展遇到的关键问题，基于Internet的云计算数据访问安全是云计算安全的中心。本文设计了基于MD5、SM2及SSF33算法和身份认证的PKI安全访问体系架构，基于此安全访问架构下的公开信道的数据访问安全得到了保证。-: This paper describes the application of cloud computing and cloud computing basic overview of the key issues encountere

More and more clients would like to store their data to PCS (public cloud servers) along with the rapid development of cloud computing. New security problems have to be solved in order to help more clients process their data in public cloud.