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Maliciously secure bit authentication / Refactoring #78

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@jschneider-bensch jschneider-bensch commented Jul 8, 2024

This includes a number of changes, large and small:

  • Simplifying AuthBit, since we don't actually need bit IDs and can base everything on indices into arrays of a known length
  • Trying to break up Party to make it a communication harness only, so everything else can be tested more easily in isolation
  • An implementation of the KOS15 maliciously secure OT extension based on CSW20
    • BaseOT
    • OT extension
  • Integrate batch bit authentication using the OT extension into the engine
  • An integrated MPC runner, based on the run_mpc example

Unfortunately, the base OT we already have since #48 was fixed is not sufficient for secure use in an OT extension, since it cannot achieve UC-security. Therefore I'm implementing the base OT from CSW20 which was specifically designed to be secure and efficient for use in KOS15.

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