期刊
ACM TRANSACTIONS ON INFORMATION AND SYSTEM SECURITY
卷 17, 期 1, 页码 -出版社
ASSOC COMPUTING MACHINERY
DOI: 10.1145/2629621
关键词
Algorithms; Security; Anonymous communication; accountable anonymity; provable security
资金
- Defense Advanced Research Projects Agency (DARPA)
- SPAWAR Systems Center Pacific [N66001-11-C-4018]
- DARPA
Users often wish to communicate anonymously on the Internet, for example, in group discussion or instant messaging forums. Existing solutions are vulnerable to misbehaving users, however, who may abuse their anonymity to disrupt communication. Dining Cryptographers Networks ( DC-nets) leave groups vulnerable to denial-of-service and Sybil attacks; mix networks are difficult to protect against traffic analysis; and accountable voting schemes are unsuited to general anonymous messaging. DISSENT is the first general protocol offering provable anonymity and accountability for moderate-size groups, while efficiently handling unbalanced communication demands among users. We present an improved and hardened DISSENT protocol, define its precise security properties, and offer rigorous proofs of these properties. The improved protocol systematically addresses the delicate balance between provably hiding the identities of well-behaved users, while provably revealing the identities of disruptive users, a challenging task because many forms of misbehavior are inherently undetectable. The new protocol also addresses several nontrivial attacks on the original DISSENT protocol stemming from subtle design flaws.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据