MPC-CMP & HSM Hybrid Architecture for Digital Asset Custody

Engineering defense-in-depth custody combining multi-party threshold cryptography with dedicated physical hardware security modules.

Hybrid MPC-HSM Defense Model

Pure software MPC leaves key shares vulnerable to host OS memory scraping, while pure HSM architecture can introduce single-point-of-compromise risks. AssetHSM combines both: MPC key shards are held exclusively within hardware enclaves across geographically isolated datacenters, requiring mathematical consensus before signing.

Mathematical Proof of Unlinkability and Non-Collusion

Utilizing zero-knowledge proofs during the MPC-CMP roundtrips, each node verifies that counterparties act honestly according to protocol rules without revealing their local shard shares, rendering insider collusion mathematically impossible.

Threshold Secret Sharing: Never assembling full private keys in memory during transaction signing ceremonies.
Hardware-Protected Key Shards: Securing individual MPC shards inside physically isolated FIPS 140-3 hardware chips.
Low Latency MPC-CMP: Completing multi-party threshold ECDSA signatures across WAN environments in under 120 ms.
Asymmetric Governance Quorum: Enforcing dynamic threshold policies (e.g. 2-of-3 for hot, 4-of-7 for cold vault transfers).

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