evm-mhf

EVM-native memory-hard function primitive.

Scope

This repository contains:

• contracts/LibMHF.sol: 3 MB Keccak-based memory-hard function
• contracts/MHFHarness.sol: thin harness for testing/integration
• test/LibMHF.t.sol: deterministic/sensitivity/gas sanity tests

Security model

• Purpose: increase concrete per-guess cost for offline dictionary attacks.
• No entropy amplification: low-entropy secrets remain dictionary-bound.
• This is a cost-throttling primitive, not a proof of sequential hardness.

Build and test

forge test

Integration example

import {LibMHF} from "evm-mhf/LibMHF.sol";

bytes32 mhtOut = LibMHF.compute(input, salt);