To minimize latency, Tor nodes forward packets as quickly as they can, which may help eavesdroppers correlate the traffic. It relies on the difficulty of tracking messages through that path, but a sophisticated and well-placed adversary can do various kinds of traffic analysis to potentially match up traffic between two endpoints, thus drawing conclusions about the participants in the communication. Tor uses multiple relay nodes, each of which only knows its predecessor and the node to pass the message on to. Rollercoaster is a recently announced mechanism that extends the functionality of mix networks in order to more efficiently communicate among groups. Tor is perhaps the best-known mix network, but there are others that make different tradeoffs to increase the security of their users. Mix networks are meant to hide that metadata by routing packets through various intermediate nodes to try to thwart the traffic analysis used by nation-state-level adversaries to identify “opponents” of various kinds. Rollercoaster: group messaging for mix networks Įven encrypted data sent on the internet leaves some footprints-metadata about where packets originate, where they are bound, and when they are sent.

LeVasseur discusses with Doc Searls and Katherine Druckman in a show that also explores new approaches to standards development, privacy versus security, diversity in tech and other long hauls on which real progress is being made. That’s one mission of her nonprofit, the Me2B Alliance. Lisa LeVasseur is a veteran engineer on a mission to get the businesses of the world, the “B’s,” to treat each of us, the “Me’s,” more respectfully online.

FLOSS Weekly 658: The Me2B’s Knees – Lisa LeVasseur.

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