Dissent: accountable anonymous group messaging

Users often wish to participate in online groups anonymously, but misbehaving users may abuse this anonymity to disrupt the group's communication. Existing messaging protocols such as DC-nets leave groups vulnerable to denial-of-service and Sybil attacks, Mixnets are difficult to protect against traffic analysis, and accountable voting protocols are unsuited to general anonymous messaging. We present the first general messaging protocol that offers provable anonymity with accountability for moderate-size groups, and efficiently handles unbalanced loads where few members wish to transmit in a given round. The N group members first cooperatively shuffle an N

• Type: Conference
• Year: 2010
• Where: CCS
• Authors: Henry Corrigan-Gibbs, Bryan Ford
• Keywords: Anonymity, Anonymous Messaging, CCS 2010, Messaging Protocol, Security Privacy