paragonie/blakechain

Hash chain using BLAKE2b

v1.1.0 2020-12-03 14:42 UTC

Requires

• php: ^7|^8
• paragonie/constant_time_encoding: ^2
• paragonie/sodium_compat: ^1.13

Requires (Dev)

• phpunit/phpunit: ^7|^8|^9
• vimeo/psalm: ^3|^4

MIT

• Paragon Initiative Enterprises

• cryptography
• hash
• blockchain
• php 7
• hash-chain
• BLAKE2
• hash chain
• append-only

README

Blakechain is a simple hash-chain data structure based on the BLAKE2b hash function.

Includes:

• The Blakechain implementation, which chains together Node objects
• A runtime Verifier class that validates the self-consistency of an entire chain (or a subset of an entire chain)

Blakechain is not a blockchain. You probably don't need a blockchain.

Blakechain provides the data structure used in Chronicle.

How Blakechain Works

The hash of each message is a keyed BLAKE2b hash, where the key of this message is the hash of the previous message.

Recursively:

$hash[$n] = sodium_crypto_generichash(
    $data[$n],
    $hash[$n - 1]
);