密码系统主要是防止非授权用户的非法进行，只有合法的用户在验证后才能进行测试和其它一些操作，比如查看数据等，增加系统和测试数据的安全性。-Password system to prevent unauthorized users from illegal carried only legitimate users to verify the test and some other operations, such as viewing data, and to increase the security of the system and test data.