本模块主要实现对系统用户及其权限进行管理，维护系统数据的安全性。系统的用户权限分为三种，管理员用户、专家及分析人员用户、一般用户。管理员用户具有最高权限，可以对系统进行设置，进行用户添加/删除/修改等，具有专家用户与分析人员拥有的权限；专家及分析人员用户，具有进行油指纹数据管理、油指纹数据特征指标计算、油指纹数据分-The main module of the system users and their permissions to manage, maintain data security. System is divided into three types of user permissions, the administrator users, experts and analysts, users, general users. Administrator user with the highest authority, the system can be set up for users to add/delete/modify, etc., with expert analysis of users and staff have the authority　experts and analysts, users have to carry out oil fingerprint data management, oil fingerprint characteristic data indicators calculation, oil fingerprint data