Hierarchical Signatures

An extension of MPC/TSS that enforces real-world business logic in the cryptography itself. Instead of simple thresholds (e.g. 'any 2 of 3'), signatures can require specific roles or conditions (e.g. CFO + CEO + Compliance Officer for large transactions). These rules are cryptographically binding, preventing spoofing, insider abuse, or collusion. Lokblok refers to this as business-logic-enforced cryptography.