Skip to content
Snippets Groups Projects
Select Git revision
  • master default protected
  • Athos-Float
  • onnx-demo-float
  • EzPC-Secfloat
  • onnx-demo
  • grouped
  • covid
  • cryptflow2
  • updatedCompilerChanges
  • docker
  • random_forest
11 results
Compare
user avatar
Small fix to license.
Nishant Kumar authored
f31440a2
History
user avatar f31440a2
History
Name Last commit Last update
..
files
src
util
.gitignore
README.md
makefile
party0.sh
party1.sh
party2.sh
setup-eigen.sh
README.md

Introduction

This folder contains code for Porthos - a semi-honest 3 party secure computation protocol.

Setup

(Ubuntu):

  • sudo apt-get install libssl-dev
  • sudo apt-get install g++
  • sudo apt-get install make

Running the protocol

  • First setup Eigen library, used for fast matrix multiplication by Porthos, by running ./setup-eigen.sh.
  • To compile use make clean && make -j.
  • Currently the codebase contains precompiled code the following 3 neural networks: ResNet-50, DenseNet-121 and SqueezeNet for ImageNet, checked into the following folder: ./src/example_neural_nets. Toggle the flag in ./src/example_neural_nets/network_config.h to switch the network which runs. Note that if there is more than one network flag uncommented (meaning ON) or if there is already a main file in src, the compilation will error out saying multiple declarations of main function.
  • To run for example the ResNet-50 code, use the following commands: ./party0.sh < ../Athos/Networks/ResNet/ResNet_img_input.inp, ./party1.sh, and ./party2.sh. Note that the first command makes use of input generated from Athos. Please refer to the Athos readme on how to do the same.

External Code

  • util/ directory contains code taken from SCAPI project.
  • basicSockets files contain code writen by Roi Inbar. We have modified this code for crypTFlow.
  • tools.cpp contains some code written by Anner Ben-Efraim and Satyanarayana. This code is majorly modified for crypTFlow.

Notes

  • If porthosSecretType != uint64_t, porthosSecretType multiplication function won't work.

  • Possible instructions for installation of libssl on Mac, though untested. -- brew install libssl -- cd /usr/local/include -- ln -s ../opt/openssl/include/openssl . Also, use the second build command for Mac to be safe. Read the Caveats part of brew install instructions, since Apple has deprecated the use of OpenSSL.

  • When extracting bits out of __m128i, val[0] corresponds to the LSB. The set functions of __m128i take the first argument as val[0].

  • Matrix multiplication assembly code only works for Intel C/C++ compiler. The non-assembly code has correctness issues when both the multiplicands are large uint64_t's

Acknowledgement

This codebase is based on an early fork of this github repo.