With increasing application of cloud computing and big data technologies, a large amount of personal information is stored on the Internet, which raises the issue of privacy leakage. To protect people’s data privacy, this paper firstly presents a new anonymous Identify-Based Encryption (IBE) scheme and gives the proof of its security under the Bilinear Diffie–Hellman Security Assumption. Then, by introducing the anonymous IBE scheme into anonymous communication fields, this paper introduces a new lightweight anonymous communication model for cloud computing, which guarantees the anonymity of system users and the security of messages in small groups. Our analysis shows that, the proposed communication model cannot only reduce memory consumption and improve message transmission efficiency, but also effectively resist traffic-analysis attacks, node eavesdropping, and finally achieve secure anonymous communication in cloud computing.

随着云计算和大数据技术的日益普及，大量的个人信息存储在Internet上，这引发了隐私泄露的问题。为了保护人们的数据隐私，本文首先提出了一种新的匿名基于身份的加密（IBE）方案，并给出了双线性Diffie-Hellman安全假设下其安全性的证明。然后，通过将匿名IBE方案引入匿名通信领域，本文介绍了一种新的用于云计算的轻量级匿名通信模型，该模型可确保系统用户的匿名性和小组中消息的安全性。我们的分析表明，所提出的通信模型不仅可以减少内存消耗并提高消息传输效率，而且还可以有效地抵抗流量分析攻击，