中文摘要：

针对手机短信存在的用户隐私泄露问题,设计一种面向手机短信的隐私保护方案.本方案结合非对称加密技术,通过使用信息接收者的公钥对原始短信进行加密获得短信密文,并结合预设的生命周期信息封装成短信自毁对象（Message Self-destructing Object,MSO）并通过运营商发送给接收者,接收者接收到MSO后对其生命周期进行验证,只有当前时间处于其生命周期内时,才能进一步使用其私钥对短信密文进行解密获取原始短信内容,一旦超过MSO的生命周期,则MSO将被自动删除以保护用户隐私安全.实验分析表明,本方案能够有效保护用户手机短信的隐私安全,实现生命周期控制并自动删除过期短信,并且对硬件系统要求低,开销合理,适合在人们日常生活中进行推广使用.

英文摘要：

In order to protect the privacy of short message, a privacy protection scheme for short message is proposed in this paper, which is based on asymmetric encryption. In this security system, the message is first encrypted by the receiver＇s public key to obtain message ciphertext. Then the message ciphertext is combined with the life time information and encapsulated into Message Self-destructing Object（MSO）. At last, the MSO is sent to the receiver through the operator.After getting the MSO, the receiver can use the private key to decrypt the ciphertext to obtain the original message only when the current time is in its life time, and after its life period, the system will automatically delete the MSO to protect the user＇s privacy. The experiments show that this scheme can effectively protect the privacy of short message and remove the expired MSO. And the system has low performance overhead, it is suitable to be used widely in people＇s daily life.