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Ultrafastsecp256K1

UltrafastSecp256k1 is an open-source C++ cryptography library implementing secp256k1 operations through CPU, GPU and embedded backends, with language bindings and compatibility shims. Its stated capabilities include ECDSA, Schnorr, FROST, MuSig2 and BIP-352.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

Ultrafastsecp256K1 — OpenViST project profile in Developer Tools.
OpenViST project illustration. See the linked sources for product details.
Understand the project

Practical overview

When it fits

Use it when a software project needs secp256k1 cryptographic operations and the team can select an appropriate backend, binding and target-specific build path.

Who it is for

  • Developers adding secp256k1 cryptographic operations to blockchain or other software.
  • C++ teams integrating a native library or a libsecp256k1-compatible shim.
  • Developers connecting language bindings or the C ABI to applications.
  • Reviewers examining the repository’s documented build, integration and audit materials.

Documented uses

  • Add ECDSA or Schnorr signing and verification to an application.
  • Integrate secp256k1 operations through a supported language interface.
  • Explore batch cryptographic workloads with an opt-in GPU backend.
  • Prototype threshold-signature workflows using the stated FROST or MuSig2 capabilities.
Before you choose

Requirements & limits

The repository is public and marked with the MIT license. The README documents source builds and platform-specific package routes; target and backend support differ by platform.

  • GPU acceleration requires an opt-in backend and is distinct from the CPU engine.
  • The compatibility shims are described as API-compatible paths but are not API-identical; consult migration documentation.
  • The README marks WebAssembly experimental with incomplete constant-time evidence.
  • The README notes that iOS SPM/CocoaPods builds have constant-time guards disabled.
  • The repository states that no external third-party security audit has been performed; its audit evidence is self-generated and reproducible.

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Build the library and run its CPU self-test

Build UltrafastSecp256k1 from source and invoke the documented self-test.

Before you start

  • A clone of the GitHub repository.
  • Python 3 and CMake, as required by the documented build commands.
  • A system with the project’s build dependencies.

Steps

  1. Clone the repository and change into its directory.

  2. Run the command below.

    Documented command
    python3 ci/configure_build.py release

  3. Build with cmake --build out/release -j.

  4. Run ./out/release/src/cpu/run_selftest.

Expected outcome

The README states that the self-test is expected to print “ALL TESTS PASSED.”

Guide limitations

  • This recipe covers the documented CPU self-test, not GPU setup or application integration.
  • The expected output is a project instruction, not a report of an independently performed test.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
Source record details
Source availability
Active
Sources checked
13 October 2026
Original website title
shrec/UltrafastSecp256k1 · Official homepage title · retained in its source language
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