The study and implementation on the security data transmission for on-line examination system

[Purpose] To study the security problems on the online examination which is applicable in the distance education such as open university in the process of the data transmission. And use the various passwords´ algorithms to encrypt the data transmission and integrate into the processs of the transmission. [Method] Design the security transmission scheme for data mixed encryption under the b/s and c/s mode coexistence, the three levels of bureaucracy, the three server system, and redevelop with Openssl. [Result] Examples prove : To use the various passwords´ algorithms to mix and encript the data and combine the encryption technology and transmission technology can achieve the expected effect on security transmission. [Conclusion] Achieve the safe and transparent data transmission through the web servers in the on-line examination system.