# BLAKE3-team/BLAKE3

the official Rust and C implementations of the BLAKE3 cryptographic hash function

Repository: https://github.com/BLAKE3-team/BLAKE3
Canonical: https://ross.abutalabs.com/products/blake3
Language: Assembly
License: Apache-2.0
License Family: permissive
Last push: 2026-08-20T09:05:36+00:00

## Health v2 (maintenance only)
Score: 98/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 98, release rhythm 98, longevity 100
- inputs: {"age_days": 2488, "days_push": 13, "days_rel": 13, "gap_med": 18, "n_releases_24m": 12}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 6398, forks 473 (observed 2026-08-28T04:09:43.085870+00:00)

## What it is
The official Rust and C implementations of the BLAKE3 cryptographic hash function, which is faster than MD5, SHA-2, and BLAKE2 while remaining secure. It supports SIMD parallelization, multithreading, verified streaming, incremental updates, and doubles as a PRF, MAC, KDF, and XOF.

## Use cases
- compute fast cryptographic hashes of files
- replace sha256sum with a faster checksum tool
- derive keys with a KDF
- verify large files with verified streaming hashes
- hash data incrementally in a Rust or C application
- implement MACs or PRFs in a security-sensitive project

## When to choose
- you need maximum hashing speed with SIMD and multithreading
- you want a modern hash function immune to length-extension attacks
- you need verified streaming or incremental hashing via a Merkle tree
- you want one algorithm that works well across x86-64, ARM, and WASM

## When to avoid
- you need password hashing specifically - use Argon2 or a dedicated password hasher instead
- you must interoperate with systems that only support SHA-2 or SHA-3
- you need FIPS-validated cryptography

## Facets
- artifact type: library
- maturity: stable
- function: cryptography, serialization
- domain: security, developer-tools
- platform: rust, cpp, c, cross-platform, cli, wasm
- tags: hash-function, blake3, simd, kdf, mac, xof, merkle-tree, b3sum, algorithms

## Member repositories
- BLAKE3-team/BLAKE3 (main) score 98

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:43.085870+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:45:01.614610+00:00, confidence not recorded.
  - readme: https://github.com/BLAKE3-team/BLAKE3 (fetched 2026-08-28T04:09:43.085870+00:00, sha cb909b3448e1)
- Data as of 2026-08-30T08:39:29.467469+00:00.