Hard Derivation

On the roadmap

Bitcoin Improvement Proposal 32 (BIP32) defines hierarchical deterministic wallets using HMAC-SHA512 for key derivation. Hardened derivation (indices ≥ 2³¹) requires the parent private key as input. Traditional implementations require this private key to exist in memory during derivation, creating a critical vulnerability. Our approach uses state-of-the-art MPC protocols to perform this derivation without ever materializing the complete private key.