The Longfellow library enables the construction of zero-knowledge protocols concerning legacy identity verification standards such as the ISO MDOC standard, the JWT standard, and W3 Verifiable Credentials. This implementation is described in:
- Anonymous credentials from ECDSA
- libzk: A C++ Library for Zero-Knowledge Proofs
- Project documentation
It is named after the bridge outside the Google Cambridge office.
You can quickly test our library by using the associated devcontainer to create its environment. Simply click on Code-->Codespaces-->Create codespace on master above to get started. This creates a docker container on a Github server that includes all of the dependencies and provides a web-based VScode interface to our current codebase. You can compile and run our benchmarks in this environment, but some of them may be slower than our reported values due to the VM.
This package depends on cmake, openssl, zstd, clang, googletest and googlebenchmark.
$ sudo apt install libssl-dev libzstd-dev libgtest-dev libbenchmark-dev zlib1g-dev
$ yum install -y clang libzstd-devel openssl-devel git cmake google-benchmark-devel gtest-devel
Ensure that Xcode command line tools such as clang and cmake are installed.
$ brew install googletest google-benchmark zstd
First run the cmake initialization step
$ CXX=clang++ cmake -D CMAKE_BUILD_TYPE=Release -S lib -B clang-build-release --install-prefix ${PWD}/install
Next:
$ cd clang-build-release && make -j 16 && ctest -j 16
We have defined several unit, sumcheck, and zk benchmarks. Here are some of them:
$ ./algebra/fft_test --benchmark_filter='BM_*'
$ ./circuits/sha/flatsha256_circuit_test --benchmark_filter=BM_ShaZK_fp2_128