000212686 001__ 212686
000212686 005__ 20190812205851.0
000212686 037__ $$aCONF
000212686 245__ $$aDissent: Accountable Group Anonymity
000212686 269__ $$a2010
000212686 260__ $$c2010
000212686 336__ $$aConference Papers
000212686 520__ $$aUsers often wish to participate in online groups anonymously, but misbehaving users may abuse this anonymity to disrupt the group. Messaging protocols such as Mix-nets and DC-nets leave online groups vulnerable to denial-of-service and Sybil attacks, while accountable voting protocols are unusable or inefficient for 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 have much data to transmit in a given round. The N group members first cooperatively shuffle an N x N matrix of pseudorandom seeds, then use these seeds in N "pre-planned" DC-nets protocol runs. Each DC-nets run transmits the variable-length bulk data comprising one member's message, using the minimum number of bits required for anonymity under our attack model. The protocol preserves message integrity and one-to-one correspondence between members and messages, makes denial-of-service attacks by members traceable to the culprit, and efficiently handles large and unbalanced message loads. A working prototype demonstrates the protocol's practicality for anonymous messaging in groups of 40+ member nodes.
000212686 700__ $$aCorrigan-Gibbs, Henry
000212686 700__ $$aFord, Bryan
000212686 7112_ $$dOctober 4-8, 2010$$cChicago, IL, USA$$a17th ACM Conference on Computer and Communications Security (CCS 2010)
000212686 8564_ $$zURL$$uhttp://dedis.cs.yale.edu/dissent/papers/ccs10/
000212686 8564_ $$zPublisher's version$$yPublisher's version$$uhttps://infoscience.epfl.ch/record/212686/files/ccs88-corrigan-gibbs.pdf$$s582829
000212686 909C0 $$xU13061$$pDEDIS$$0252572
000212686 909CO $$ooai:infoscience.tind.io:212686$$qGLOBAL_SET$$pconf$$pIC
000212686 917Z8 $$x257875
000212686 917Z8 $$x148230
000212686 917Z8 $$x148230
000212686 937__ $$aEPFL-CONF-212686
000212686 973__ $$rREVIEWED$$sPUBLISHED$$aOTHER
000212686 980__ $$aCONF