# Digital Asset Custody > Zero-custody infrastructure for institutional digital asset custodians. No stored private keys means no key theft, no insider risk, no legal-compulsion attack surface, and MiCA alignment. ## What Changes for a Custodian - **No stored signing keys.** The wallet keys controlling client assets do not exist at rest. Reconstruction is policy-bound and hardware-enforced. - **Insider risk collapses.** Even a fully privileged operator cannot extract a key. - **Lawful-access compulsion has no target.** The custodian cannot produce a key it does not possess. - **Audit becomes cryptographic.** Every reconstruction event is provable from public material. - **MiCA alignment.** Segregation, governance, and operational-risk requirements map cleanly onto the policy engine. ## Integration Compatible with major custody platforms, exchanges, and wallet infrastructures. Phantom Secrets™ replaces the signing-key layer without rebuilding the surrounding system. ## Related - Phantom Secrets™: /api/md/products/phantom-secrets - Hierarchical Signatures: /api/md/features/hierarchical-signatures - Transfer on Sale: /api/md/features/transfer-on-sale - Banking and Finance: /api/md/solutions/banking-finance