Google builds crypto custody for banks: what it means for your coins

Google is building a custody service for crypto assets. The target group is banks and large financial institutions; retail investors are not on the list. It was presented on October 28, 2026 under the name Google Multi-Party Compute. The core is simple: the private key used to sign a transfer on a blockchain never sits complete in one place. It breaks into parts that are spread across separate compute environments, and a signature comes about only once enough parts work together. For your own coins, nothing changes today. The news matters for a different reason: the most common cause of very large losses in the crypto market is a key that falls into the wrong hands. Broken protocols and wrong views on price cost the market considerably less. What Google Multi-Party Compute is and how a signature arises without a complete key Multi-party computation, MPC for short, is a cryptographic method in which several participants jointly compute a result without any of them seeing the others' inputs. Applied to the custody of crypto assets: the private key is split into fragments instead of being copied and locked away in one place. Each fragment sits in a different environment, for instance ...