---
id: "blake3hash"
kind: "datatype"
status: "draft"
is_pii: false
categories: ["cryptography"]
langs: ["common"]
quality: 75
url: "http://registry.apicrafter.io/datatype/blake3hash"
---

# BLAKE3 hash (`blake3hash`)

> **Draft.** Draft records have not been reviewed yet and may be incomplete or wrong; do not treat them as authoritative for legal or compliance decisions.

Digest of the BLAKE3 hash function with its default 256-bit output, written as 64 hexadecimal digits. BLAKE3 is a fast successor of BLAKE2 and one of the registered algorithms of OCI content digests. It can also produce longer outputs, which the regexp does not cover. Other 256-bit digests (SHA-256, SHA3-256, Keccak-256, BLAKE2b-256 and Streebog-256) have the same length, so the value alone does not tell them apart: use the field name or context.

- Parent datatype: `hash`
- Personal data (PII): no
- Categories: Cryptographic identifiers (cryptography)
- Countries: global
- Languages: Common to most languages (common)
- Classification: identifier

## Detection

Regular expression (Python `re`):

```
^[0-9a-fA-F]{64}$
```

## Examples

- `af1349b9f5f9a1a6a0404dea36dcc9499bcb25c9adc112b7cc9a93cae41f3262` — BLAKE3 hash of the empty string
- `6437b3ac38465133ffb63b75273a8db548c558465d79db03fd359c6cd5bd9d85` — BLAKE3 hash of the string 'abc'
- `af1349b9f5f9a1a6a0404dea36dcc9499bcb25c9adc112b7cc9a93cae41f326` (invalid example) — one hex digit short (63 instead of 64)

## Sources

- wikipedia: <https://en.wikipedia.org/wiki/BLAKE_(hash_function)>
- other: <https://github.com/BLAKE3-team/BLAKE3>

## Quality

Score 75/100. Missing: mapping (Wikidata, Schema.org, ...), translation, detector coverage.

JSON: <http://registry.apicrafter.io/api/v1/datatypes/blake3hash.json> · Edit: <https://github.com/apicrafter/metacrafter-registry/edit/main/data/datatypes/any/cryptography/blake3hash.yaml>