Abstract: In order to protect the whistleblower's identity privacy (identity information and location information) from being acquired by any organization, including the one that the whistleblower reports to, an online secret whistleblowing scheme is proposed.The scheme allows the anonymous whistleblower to send encrypted messages to the target agency by using a public key algorithm and a random forwarding method.The encrypted messages are forwarded for several times by a sequence of nodes in the network, and finally reach the target agency.Any forwarding node or attacker cannot get the plaintext of the original message, nor could any node, including the target agency or any third party, get the identity privacy of the whistleblower.If the reported information is verified, the target agency can award the whistleblower while the identity and location information of the whistleblower remains undisclosed.In addition, all forward nodes are randomly chosen and the proposed scheme doesn't rely on any specific node, so the robustness of the system is ensured.Experimental results show that the proposed scheme can support multiple whistleblowers to report messages in a large-scale network while the average response time does not grow sharply with the number of nodes, so the system displays high reliability and stability.

Key words: anonymous secret whistleblowing, anonymous communication, public key system, random forwarding, identity privacy

摘要： 为保护举报者的身份隐私（身份信息和位置信息）不被包含举报受理机构在内的任意组织获取，提出一种在线匿名秘密举报方案。匿名举报者借助公开密钥算法通过随机转发的方法将加密举报信息发送给举报受理机构，加密举报信息经过网络中一系列中转节点的转发最终到达举报受理机构，任何中转节点和攻击者不能获取举报信息的明文，包含举报受理机构在内的所有节点以及外来攻击者无法取得举报人的身份隐私，如举报信息属实，举报机构可以对举报者进行奖励，同时仍然保持举报者的身份和位置信息不会泄露给举报受理机构或者任意第三方。由于中转节点是随机选择的，不依赖于某些特定节点，从而保证系统的健壮性。实验结果表明，该方案能够支持大型网络中多个举报者顺利完成举报，系统不会出现平均响应时间随节点个数增加而急剧增长的现象，具有良好的可靠性和稳定性。

关键词: 匿名秘密举报, 匿名通信, 公开密钥系统, 随机转发, 身份隐私

CLC Number: 

• TP309