Abstract
With the popularity of computer networks, the network test has widely used as one of test formats, and will be a major test format. However, with the continuous development of network test system, security has received increasing attention. This paper analyzes the general characteristics of the network test system, and study how the encryption technology is used in network test system in order to enhance its security. On this basis, the network test system is designed and implemented with the security features. The system has not only the functions of the general examination system, and also the functions of the security such as encrypted and signed the test papers, signed answers and gradesetc.. System is developed by the development of PHP + MYSQL + APACHE, which is popular for the web development in the current.
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