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Donar: Anonymous VoIP over Tor


We present DONAR, a system enabling anonymous VoIP with good quality-of-experience (QoE) over Tor. No individual Tor link can match VoIP networking requirements. DONAR bridges this gap by spreading VoIP traffic over several links. It combines active performance monitoring, dynamic link selection, adaptive traffic scheduling, and redundancy at no extra bandwidth cost. DONAR enables high QoE: latency remains under 360 ms for 99% of VoIP packets during most (86%) 5-minute and 90-minute calls.
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Dates and versions

hal-03923695 , version 1 (04-01-2023)


  • HAL Id : hal-03923695 , version 1


Yérom-David Bromberg, Quentin Dufour, Davide Frey, Etienne Rivière. Donar: Anonymous VoIP over Tor. NSDI 2022 - 19th USENIX Symposium on Networked Systems Design and Implementation, Apr 2022, RENTON, WA, United States. pp.1-17. ⟨hal-03923695⟩
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