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Tuesday, April 23

Tor Bridge Distribution Powered by Threshold RSA

Jordan Deyton, University of Tennessee - Knoxville, Knoxville, TN
ORNL Seminar
10:00 AM — 11:00 AM, Conference Center, Building 5200, Room 214 (Emory)
Contact: Jay Jay Billings (, 865.241.6308


Since its inception, Tor has offered anonymity for internet users around the world. Tor now offers bridges to help users evade internet censorship, but the primary distribution schemes that provide bridges to users in need have come under attack. This talk explores how threshold RSA can help strengthen Tor's infrastructure while also enabling more powerful bridge distribution schemes. We implement a basic threshold RSA signature system for the bridge authority and a reputation-based social network design for bridge distribution. Experimental results are obtained showing the possibility of quick responses to requests from honest users while maintaining both the secrecy and the anonymity of registered clients and bridges.