---
title: "BLAKE2b-224"
description: "BLAKE2b with a 28-byte output. Cardano's hash of payment and stake keys and scripts"
canonical_url: "https://hashes.agntn.dev/algorithms/blake2b-224"
---
# BLAKE2b-224

> BLAKE2b with a 28-byte output. Cardano's hash of payment and stake keys and scripts

<algorithm-facts name="blake2b-224">



</algorithm-facts>

The 28-byte BLAKE2b behind Cardano's addresses: payment key hashes, stake key hashes, script hashes. Like [BLAKE2b-256](https://hashes.agntn.dev/algorithms/blake2b-256), the length is part of the computation, not a cut afterwards.

```ts
create("blake2b-224").hash("").digest;
// "836cc68931c2e4e3e838602eca1902591d216837bafddfe6f0c8cb07"
```

Hash the key's bytes, so a key you hold as hex goes in through `Uint8Array.fromHex` or `inputEncoding: "hex"`. No HMAC mode.


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