Function Secret Sharing

fss contains several Rust libraries for designing and using functional secret sharing schemes.

WARNING: This is an academic prototype, and in particular has not received careful code review. These libraries are NOT ready for production use.

Overview

A funtional secret sharing (FSS) scheme is a cryptographic primitive which enables a party to secret-share a function. In particular, a FSS scheme takes as input a function f, and outputs a number of succinct keys which are distributed among parties. These keys enable each party to efficiently generate a secret share of a function evaluation f(x) while not revealing any information about f.

This library provides the following Rust crates:

• funcs/: Provides generic implementations of various function secret-sharing schemes

Build guide

The library compiles on the nightly toolchain of the Rust compiler (v 1.59+). To install the latest version of Rust, first install rustup by following the instructions here, or via your platform's package manager. Once rustup is installed, install the Rust toolchain by invoking:

rustup install nightly

After that, use cargo, the standard Rust build tool, to build the libraries:

git clone https://github.com/ryanleh/fss.git
cd fss
cargo build --release

Note: The nightly toolchain is required since we use the unstable min_specialization feature to lower communication costs. No other unstable features are used.

Tests

This library comes with comprehensive tests for each of the provided crates. Run the tests with:

cargo test --all

Benchmarks

This library comes with benchmarks for each of the provided crates. Run the benchmarks with:

cargo bench

License

This library is licensed under the MIT License