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 - [Fundamentals](#fundamentals)
 - [Messaging](#messaging)
+- [Anonymity](#anonymity)
 
 ## Fundamentals
 
 - [SoK: Secure Messaging](http://cacr.uwaterloo.ca/techreports/2015/cacr2015-02.pdf) - evaluation of current secure messaging solutions based on security, usability and adoption
 
-- [The Differences Between Onion Routing and Mix Networks](https://crypto.is/blog/mix_and_onion_networks) - brief comparison
-
 ## Messaging
 
 - [Double Ratchet](https://signal.org/docs/specifications/doubleratchet/) - two-party protocol to exchange encrypted messages based on shared key
 
 - [X3DH](https://signal.org/docs/specifications/x3dh/) - two-party asynchronous key agreement protocol
+
+## Anonymity
+
+- [The Differences Between Onion Routing and Mix Networks](https://crypto.is/blog/mix_and_onion_networks) - brief comparison
+
+- [Anonymity Trilemma: Strong Anonymity, Low Bandwidth Overhead, Low Latency—Choose Two](https://eprint.iacr.org/2017/954.pdf) - on fundamental tradeoff for anonymous communication protocols