SCL is a utilities library for prototyping Secure Multiparty Computation (MPC for short) protocols. The focus of SCL is usability, not necessarily speed. What this means is that SCL strives to provide an intuitive, easy to use and understand, and well documented interface that helps the programmer prototype an MPC protocol faster (and nicer) than if they had to write everything themselves.

SCL provides high level interfaces and functionality for working with

• Secret sharing, additive and Shamir.
• Finite fields.
• Primitives, such as hash functions and PRGs.

SCL in addition provides methods for running protocols on both a real network, where each party is connected via TCP, as well as a simulated network.

SCL is distributed under the GNU Affero General Public License, for details, refer to LICENSE or https://www.gnu.org/licenses/.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

SCL uses gmp for working with Elliptic Curves, and catch2 for testing and lcov for test coverage.

The CMake file recongnizes two different build types: Debug and Release, the latter being the default. In either case, building is straight forward and can be done with the commands

cmake . -B build -DCMAKE_BUILD_TYPE=<Debug|Release>
cmake --build build

In case the Release build is used, SCL can be installed by running

sudo cmake --install build

after the build command. By default, headers are install in usr/local/include and the shared library in /usr/local/lib. This location can be controlled by setting the CMAKE_INSTALL_PREFIX accordingly.

Support for Elliptic Curves can be disabled (and thus remove the need to have gmp installed) by passing -DWITH_EC=OFF to cmake.

To use SCL, link libscl.so when building your program and include the include/ directory to your builds includes. The test folder is a good place to see examples of how the different functionality works.

SCL uses Doxygen for documentation, which can be generated by running make documentation from within the build folder. The generated documentation is placed in the doc folder.

I'd greatly appreciate any work that uses SCL include the below bibtex entry

@misc{secure-computation-library,
    author = {Anders Dalskov},        
    title = {{SCL (Secure Computation Library)---utility library for prototyping MPC applications}},
    howpublished = {\url{https://github.com/anderspkd/secure-computation-library}},
}