网络编码中的安全问题研究

项目名称： 网络编码中的安全问题研究

项目编号： No.61301166

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 程池

作者单位： 中国地质大学（武汉）

项目金额： 24万元

中文摘要： 近来的研究揭示了诸如污染攻击和熵攻击等恶意行为给基于网络编码的系统带来的巨大危害。如不妥善解决，将导致网络编码的优势无法发挥。本项目首先针对网络编码的不同应用场景，建立相应的安全模型。根据所给出的安全模型，提出相应的基于同态消息认证码的方案，来同时防御污染攻击和熵攻击。接下来，以点带面，针对单信源和多信源网络编码中的安全问题，采用现代密码学的理论和方法，给出全面防御各种攻击的方案。其中关键的是，设计能够给出严格安全证明的安全协议和方案，以及适用于网络编码的密钥分配方案。然后，在保证安全性的前提下，努力降低所提方案和协议所需的计算和通信开销。随后，努力探索信息理论意义上安全的网络编码认证协议，并力争给出严格的安全证明。最后，用系统仿真来验证所提方案的有效性和可靠性。项目预期成果能够为基于网络编码的系统提供可靠的安全保障，并促进现代密码学中同态认证等理论的进一步深化和发展。

中文关键词： 网络编码；污染攻击；同态认证；同态签名；同态消息认证码

英文摘要： Recent work has demonstrated the severe harm of attacks such as pollution attacks and entropy attacks. If we cannot solve these problems properly, the communication system that employs network coding may face severe challenges, which could even destroy the benefits of network coding. In this project, we will first try to establish the security model according to various requirements of systems that employ network coding. Under these security models, we will propose schemes based on the homomorphic message authentication codes to resist against pollution attacks and entropy attacks, simultaneously. Then, we will employ the modern cryptography theory and tools to resist against various attacks in single source and multi-source network coding, respectively. Among them, the vital issue is the design of authentication schemes with rigorous proofs of security, and key distribution schemes for network coding. Next, we will try to reduce the computation and communication cost of the proposed schemes, while keep the schemes safe. Furthermore, we will try to find the information-theoretically secure authentication schemes for network coding based system where the attackers have unbounded computational power, and give rigorous proofs on security of the proposed schemes. Finally, we will verify the efficiency of the propo

英文关键词： Network coding；pollution attacks；homomorphic authentication；homomorphic signature；homomorphic message authentication codes