---
id: "blake2b512hash"
kind: "datatype"
status: "stable"
is_pii: false
categories: ["cryptography"]
langs: ["common"]
quality: 85
url: "http://registry.apicrafter.io/datatype/blake2b512hash"
---

# BLAKE2b-512 hash (`blake2b512hash`)

Digest of the BLAKE2b hash function with a 512-bit output. It is written as 128 hexadecimal digits. Other 512-bit digests (SHA-512, SHA3-512, Keccak-512 and Streebog-512) 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]{128}$
```

## Examples

- `786a02f742015903c6c6fd852552d272912f4740e15847618a86e217f71f5419d25e1031afee585313896444934eb04b903a685b1448b755d56f701afe9be2ce` — BLAKE2b-512 hash of the empty string
- `ba80a53f981c4d0d6a2797b69f12f6e94c212f14685ac4b74b12bb6fdbffa2d17d87c5392aab792dc252d5de4533cc9518d38aa8dbf1925ab92386edd4009923` — BLAKE2b-512 hash of the string 'abc'
- `786a02f742015903c6c6fd852552d272912f4740e15847618a86e217f71f5419d25e1031afee585313896444934eb04b903a685b1448b755d56f701afe9be2c` (invalid example) — one hex digit short (127 instead of 128)

## Metacrafter rules

2 rules: 1 match the field name, 1 match values.

- `blake2b512hash` (data, `basic/crypto.yaml`)
- `blake2b512hash_by_field` (field, `basic/crypto.yaml`)

## Supported by tools

- `metacrafter`

## Sources

- wikipedia: <https://en.wikipedia.org/wiki/BLAKE_(hash_function)>
- doc: <https://www.rfc-editor.org/rfc/rfc7693>

## Quality

Score 85/100. Missing: mapping (Wikidata, Schema.org, ...), translation.

JSON: <http://registry.apicrafter.io/api/v1/datatypes/blake2b512hash.json> · Edit: <https://github.com/apicrafter/metacrafter-registry/edit/main/data/datatypes/any/cryptography/blake2b512hash.yaml>