Overview
- Google unveiled Google Multi‑Party Compute at a New York MPC symposium on Wednesday and says the service is in private preview with several unnamed major financial institutions while Alphabet is already using it to secure assets on Ethereum and Solana.
- The service uses multi‑party computation to split a private key into fragments held across separate environments and runs a policy engine inside Google’s Confidential Space to check limits, destination restrictions and approval rules before producing a signature.
- Google plans to support ECDSA and Ed25519 at general availability and says it cannot access customers’ key shares in unencrypted form, but it has given no timetable for post‑quantum signature support or related benchmarks.
- Key commercial details remain undisclosed: Google has not named testing partners, revealed assets or values held, published performance comparisons, or announced pricing, and it says commercial availability depends on completing the private preview and is targeted for early 2027.
- The launch responds to continuing losses from compromised private keys—Chainalysis estimated 43.8% of 2024 thefts came from key compromise—and could push banks toward distributed signing, though experts warn MPC lowers but does not remove operational risk when shares, administrators or recovery tools are centralized; regulators and institutional risk teams are likely to scrutinize controls and recovery processes as testing continues.