Update
Google Cloud Details Bitcoin Custody Service
Google Cloud has detailed a Multi-party Compute (MPC) service for institutional Bitcoin custody. The service, in preview, allows financial institutions to jointly authorize and sign cryptocurrency transactions without giving any single party control over the full private key. The service is expected to be available at the Google Cloud MPC Symposium in New York, which is scheduled for Wednesday. Google Cloud has previously explored related technology through Confidential Space, a cloud environment designed for secure multi-party computation and data sharing.