Kasai是基于Java开发的开源RBAC软件 Kasai系统的优点：基本上实现了用户users(USERS)、角色roles(ROLES)、目标objects(OBS)、操作operations(OPS)、许可权permissions(PRMS)五个基本数据元素。同时Kasai也引入了Group的概念。 -Kasai is a Java-based open source development RBAC system sof

凯撒密码实现，输入一段字符然后输入想要移动的位数，则将这串字符加密-Caesar cipher implementation, enter a character and then enter the number of bits you want to move, then this string of characters encryption