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Google Cloud has detailed a Multi-Party Compute (MPC) service that lets banks jointly authorize and sign crypto transactions without any one party holding a complete private key, according to Cointribune. The documentation update came on Monday, Oct 28, 2026, ahead of Google Cloud’s MPC Symposium in New York on Wednesday.
Cryptobriefing reported that a wider launch is expected around 2027 and that the product sits in private preview, meaning Google supplies it as is with potentially limited support. Cointelegraph reported that the symposium description promised an “exclusive revealing” of the product and research projects, with speakers from Morgan Stanley, OKX, Citi and Wells Fargo.
Also read: Sberbank Cleared to Trade Crypto and Custody Assets in Russia
Key facts
- The service splits a private key into separate shares held by different parties, so a full key never sits in one place, per Cryptobriefing.
- Google says current protections focus on compromised credentials and unauthorized transactions, with post-quantum support described as a future capability.
- Cointelegraph reported that Google Cloud’s release notes for the service date back to August 2026, and that on Oct 1 the company expanded its Bitcoin security rules to evaluate transaction amounts, identify destination address types and detect change outputs.
- Cryptobriefing reported that the MPC architecture used by Google Cloud has run in collaboration with federally chartered crypto bank Anchorage Digital since 2025.
- Cointribune reported that Alphabet already uses the architecture to protect its own token reserves on Ethereum and Solana.
What Google is building and who it competes with
The mechanics are straightforward: an attacker who breaches one server or phishes one employee ends up with a fragment rather than the whole key. Google frames that as removing a single point of failure, which is the concern banks raise when regulators ask how private keys are protected.
Cointribune reported that private tests have been conducted with major institutions and that the American group positions itself against specialist custodians including Fireblocks, BitGo and Coinbase Custody. Google Cloud’s Universal Ledger, designed for tokenized deposits and round-the-clock settlement, is integrating with banking technology provider Jack Henry as of Oct 16, 2026, according to Cryptobriefing.
The reports diverge on framing rather than facts. Cointribune presented the service as formally unveiled and tied its timing to AI-driven cyber threats; Cointelegraph described it as a preview product documented in an update, noting that Google provides it with potentially limited support.
Why it matters
Custody is the step where banks decide whether to hold digital assets at all, so a version backed by a major cloud provider changes the shortlist of vendors institutions consider. MPC is also becoming a standard rather than a differentiator: Gemini Custody announced it would move all institutional accounts to MPC starting Oct 8, 2026, according to Cryptobriefing.
The technology narrows one risk without eliminating others. Cryptobriefing noted that MPC does not remove dangers from poorly designed approval policies, collusion among key holders or flaws in the software coordinating the signing.
What to watch
The concrete milestone is the move out of preview toward the broader rollout expected around 2027. Cointelegraph reported that it contacted Google Cloud and Rich Widmann, Google’s director of digital assets strategy, for clarification on availability and the launch timeline.
This article is not financial advice, and crypto and equity markets are volatile and uncertain.
Reported by cointribune.com.
Sources: Cointribune, Cryptobriefing, Cointelegraph