Stateless communication security signature method, terminal and server end

The invention provides a stateless communication security signature method. The method comprises the steps that a terminal stores a preset key unified with a server end; the terminal encrypts the keyfor at least two times to obtain a first encrypted character string; the server end encrypts according to an encryption mode of the terminal to obtain a second character string; the server end compares the first character string with the second character string to find whether the two character strings are same, thereby judging whether a request of the terminal passes. The invention also providesthe terminal and the server end. Compared with related art, the stateless communication security signature method, the terminal and the server end have high security and good reliability. 本发明提供了种无状态通信安全签名方法，该方法包括如下步骤：所述终端存储与所述服务器端统的预定密钥；所述终端经过至少两次加密得到加密后的第字符串；所述服务器端按所述终端的加密方式进行加密得到第二字符串；所述服务器端比较所述第字符串和所述第二字符串是否相同，以判断所述终端的请求是否通过。本发明还提供种终端及服务器端。与相关技术相比，本发明的无状态通信安全签名方法、终端及服务器端安全性高且可靠性好。