This work explores how to enhance pseudonymous whistleblower submission systems, specifically by supporting protocol level unlinkability, while also making the system resilient against (distributed) denial of service attacks. To that end, we propose a blind signature based protocol which facilitates assignment of trust to anonymous posters in a manner which depends on the quality of prior posts, yet unlinkable to said posts or corresponding poster. This (multi-level) trust is leveraged to prioritize the posts, thus mitigating the effect that spam posts may have on the party reviewing the posts. We design and carry out simulations to explore the resilience of the whistleblower submission system against denial of service attacks while applying the proposed approach. Our experiments affirm that for a range of realistic scenarios the proposed approach provides reasonable mitigation.

这项工作探索了如何增强匿名举报者提交系统，特别是通过支持协议级别的不可链接性，同时还使系统具有抵御（分布式）拒绝服务攻击的能力。为此，我们提出了一种基于盲签名的协议，该协议便于以匿名方式将信任分配给匿名发帖人，具体方式取决于先前帖子的质量，但无法与所述发帖或相应发帖人链接。利用此（多级）信任来对帖子进行优先级排序，从而减轻垃圾邮件帖子可能会对审核帖子的一方产生的影响。我们设计并进行了仿真，以探索举报者提交系统针对拒绝服务攻击的弹性，同时应用提出的方法。