awesome-secure-messaging/README.md

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Awesome Secure Messaging

A curated collection of links for secure messaging. Part of the "Awesome X" series.

The list is periodically updated with new links. Click "Watch" in the right top corner to follow.

Your contributions are welcomed.

Table of Contents

Fundamentals

Messaging

Trust establishment

  • X3DH - two-party asynchronous key agreement protocol

  • Bramble QR Code Protocol - in-person key agreement protocol to establish a shared secret

Anonymity

Censorship Resistance

Cocercion Resistance

Attacks

  • The Sybil Attack - attack on p2p systems from cheap identity generation, requiring some form of logically centralized authority

Applications

  • Briar - messaging app employing several censorship-resitance techniques, like direct device-to-device comms (bluetooth, wifi), Tor routing

  • Signal - widely used security-based messaging app with intermediate server and phone based registration, includes voice calls