网络时代密码多,密码似乎成了人们与外界接触的通行证。各种各样的密码如形形色色的密钥,帮助人们打开现实世界和虚拟世界的一扇又一扇的门。密码在保障人们信息、财产安全的同时,也给人们的生活带来了不少烦恼。随着现实世界和虚拟世界变得越来越复杂,密码问题日益突出,简单的不安全,复杂的记不住,弄混或忘记更是家常便饭。如今,几乎每个人都有被密码纠缠、困扰的经历。传统的身份认证方法除了使用用户名、密码等 Internet age password and password seems to have become the people in contact with the outside world pass. Various kinds of passwords, such as various kinds of keys, help people open one after another of the real world and the virtual world. Password in the protection of people’s information, property safety, but also to people’s lives has brought a lot of trouble. As the real and virtual worlds become more complex, the password issue becomes more prominent, simple unsafe, complicated to remember, confusing or forgetting more commonplace. Almost everyone now has a password-entangled, haunting experience. In addition to the traditional authentication methods using user name, password and so on