Google Wallet integrates ZK-proofs, a tech incubated by crypto industry

By Matt Brienen

Published: 2025-05-02T18:57:24+00:00

Google is integrating zero-knowledge proofs into its wallet as an identity solution, according to a recent announcement. The digital ID will initially roll out in the UK, but will soon be introduced in the United States and other countries.

"Given many sites and services require age verification, we wanted to develop a system that not only verifies age, but does it in a way that protects your privacy," Google wrote in a blog on Tuesday. "That's why we are integrating Zero Knowledge Proof (ZKP) technology into Google Wallet, further ensuring there is no way to link the age back to your identity."

It’s unclear whether the ZK tech is related to crypto at all; however, it will be made open-source for other wallets and online services.

Zero-knowledge proofs were largely of academic interest to cryptographers and computer scientists before finding practical applications in the crypto industry. Projects like Zcash contributed serious innovations to the tech, which is now being implemented in and out of crypto for anything from scalability to privacy.

Introduced in the 1980s by Shafi Goldwasser, Silvio Micali, and Charles Rackoff, zero-knowledge proofs are used to prove statements without revealing any underlying information. The classic example is proving to a bartender that someone is of drinking age without revealing their actual age.