Katzenpost is conducting research and writing libraries for mix networks. The team is building tools with the goal of preventing passive eavesdropping that is able to detect who is communicating with whom, while at the same time providing reliable out-of-order delivery. While moving to a decentralized world, we believe approaches that help defend a user’s privacy against metadata analysis will be fundamental.
“An especially problematic excision of the political is the marginalization within the cryptographic community of the secure-messaging problem, an instance of which was the problem addressed by David Chaum. Secure-messaging is the most fundamental privacy problem in cryptography: how can parties communicate in such a way that nobody knows who said what. More than a decade after the problem was introduced, Rackoff and Simon would comment on the near-absence of attention being paid to the it.” - Phillip Rogaway, The Moral Character of Cryptographic Work
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