Google unveils bank-grade crypto custody tool built on split keys

Google is set to debut Google Multi-Party Compute, a crypto custody system that splits signing keys across separate systems, at its digital assets symposium in New York. The product, currently in private preview with financial institutions, applies multi-party computation to signing keys, requiring a set number of fragments to sign a transaction without ever assembling the full key in one place. Google plans commercial availability in early 2027 and has not disclosed pricing. The system allows institutions to set thresholds such as two-of-three or five-of-seven, with a policy engine inside Google's Confidential Space checking transfers against limits and approval rules before any signature.