libscapi is the Open source C++ library for implementing high performance secure two-party and multiparty computation protocols (SCAPI stands for the "Secure Computation API"). It provides a reliable, efficient, and highly flexible cryptographic infrastructure.
Libscapi is developed by Bar Ilan University Cryptography Research Group. The goal of libscapi is to promote research by Academy and Industry practitioners in this field by providing:
- A consistent API over Primitives, Mid-Layer Protocols, Interactive Mid-Layer Protocols and Communication Channels, simplifying the development and evaluation fo new protocols. We focus on keeping libscapi easy to build and use.
- Integrating best performance open-source implementations by other Academy Research Institutes.
- High Performance implementation on standard Linux & Intelx64 Architecture. We use modern techniques like Intel Intrinsics Instructions, Pipelining and TCP optimizations.
- Generalizing the SPDZ Compiler For Other Protocols. Accepted ACM-CCS 18 ABFKLOT18
- An End-to-ent System for Large Scale P2P MPC as-a-Service and Low-Bandwidth MPC for Weak Participants. Includes HyperMPC protocol Accepted ACM-CCS 18 BHKL18
- TinyKeys: A New Approach to Efficient Multi-Party Computation HOSSV18
- Fast Large-Scale Honest-Majority MPC for Malicious Adversaries CGHIKLN18
- A Framework for Constructing Fast MPC over Arithmetic Circuits with Malicious Adversaries LN17
- Low Cost Constant Round MPC Combining BMR and Oblivious Transfer HSSV17
Libscapi is integrated with MATRIX MPC Test Automation Framework. We use MATRIX to benchmark protocols on AWS cloud, including cross region experiments with up to 500 parties. MATRIX can easily run protocols that do not integrate libscapi as well, including for example the SPDZ-2 protocol implementation by Btistol University.
The MPC-Benchmark repository includes protocols implemented using libscapi, and integrated with the MATRIX benchmarking and automation platform. This includes implementations of the protocols listed above.
- Primitives: Dlog, Cryptographic Hash Function, HMAC and KDF, Pseudorandom Functions and Permutations, Pseudo Random Generator, Trapdoor Permutation, Random Oracle etc.
- Mid-layer protocols: Public Key Encryption Schemes: Cramer-Shoup, Damgard-Jurik, El-Gamal
- Interactive Mid-layer protocols: Sigma Protocols, Zero Knowledge Proofs, Commitment Schemes
- OT Extension : Wrappers for LibOTE and SimpleOT by OSU-Cypto and Bristol University
- Circuits: Some commonly used circuits for AES etc
- Communication Channel: TCP Peer-To-Peer communication setup and channel methods
- ScapiLite is an experimental version used to develop MPC protocols on Android and Raspberry Pi. It has also been ported to Javascript using emscripten. ScapiLite currently supports secret-sharing protocols only (As no OT has been ported)
- We have discontinued support for the Java Scapi library due to performance and portability issues. We would be happy to support anyone interested in developing new Java or Go bindings.
Libscapi is released under the MIT open source license. However, some of the libraries we use have different licenses. For further information please refer to LICENSE.md
Go to http://biulibscapi.readthedocs.org/ for a detailed explanations of our implementation.
Libscapi runs on Linux, MacOS and ARM64 and has been tested on the following version:
- Ubuntu 14.04/16.04/18.04 LTS
- CentOS 7.3
- Mac OS High Sierra 10.13
- ARM64 - tested on Cortex A72 with Ubuntu 18.04 LTS (prior versions to 18.04 on ARM may run as well).
For detailed instructions, see INSTALL.md
Cryptography Research at Oragon State University : LibOTE A fast, portable, and easy to use Oblivious Transfer Libary
https://github.com/osu-crypto/libOTe
This library provides several different classes of OT protocols. First is the base OT protocol of Naor Prinkas [NP00]. This protocol bootstraps all the other OT extension protocols. Within the OT extension protocols, we have 1-out-of-2, 1-out-of-N and ~K-out-of-N, both in the semi-honest and malicious settings. All implementations are highly optimized using fast SSE instructions and vectorization to obtain optimal performance both in the single and multi-threaded setting. See the Performance section for a comparison between protocols and to other libraries.Networking can be performed using both the sockets provided by the library and external socket classes.
University of Bristol: Advanced Protocols for Real-world Implementation of Computational Oblivious Transfers
https://github.com/bristolcrypto/apricot
http://users-cs.au.dk/orlandi/simpleOT/
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