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Libbls

Libbls is a C++ mathematical library that implements BLS threshold signatures and multisignatures, distributed key generation, and threshold encryption for blockchain developers.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

Libbls — 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 C++ blockchain implementation needs the documented BLS, DKG, or threshold-encryption primitives and its development team can assess the library's alpha status and integration requirements.

Who it is for

  • C++ developers implementing cryptographic workflows in blockchain systems.
  • Teams exploring threshold signing, distributed key generation, or threshold encryption.

Documented uses

  • Add BLS signing, verification, or multisignature primitives to a blockchain application.
  • Coordinate distributed key generation among participants.
  • Build a threshold-encryption workflow that encrypts and decrypts data and verifies or combines shares.
Before you choose

Requirements & limits

  • The project documents Ubuntu and macOS builds; Linux requires GCC/G++ 11 or newer, while macOS uses Apple Clang.
  • MCL is the algebra backend and GMP supports arbitrary-precision integers.
  • The README describes alt_bn128 compatibility with Ethereum cryptography and states a security level of 128 bits.
  • The project identifies itself as alpha software, with further hardening and testing underway, possible breaking changes, and no security review or audit.

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 libBLS on Ubuntu

Configure and build the library from source on Ubuntu.

Before you start

  • Ubuntu
  • GCC/G++ 11 or newer
  • CMake
  • The listed platform packages: automake, build-essential, libgnutls28-dev, libtool, pkg-config, yasm, texinfo, autoconf, and clang-format-14

Steps

  1. Clone the repository and change into its directory.

  2. Install the listed Ubuntu packages.

  3. Build dependencies by running cd deps, the command below, and cd ...

    Documented command
    bash ./build.sh

  4. Configure with cmake -S . -B build.

  5. Build default targets with cmake --build build --parallel $(nproc).

Expected outcome

The documented process configures and builds the default targets from source.

Guide limitations

  • The README characterizes the library as alpha software and notes that it may undergo breaking changes.
  • A successful build does not establish security or production suitability.
Documentation 1 ↗
Evidence and transparency

Sources & review

Official repository ↗
Source record details
Source availability
Active
Sources checked
14 October 2026
Original website title
skalenetwork/libBLS · Official homepage title · retained in its source language
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