The Buenos Aires government has introduced zero-knowledge proofs into its app for accessing city services, aiming to strengthen residents' privacy. The app, called miBA, has integrated QuarkID, a digital identity service that uses zero-knowledge proofs to allow users to authenticate government-issued documents without disclosing unnecessary personal information. The technology is being tested in other jurisdictions, including Uruguay. The app enables residents to confirm their age without revealing their birthdate or address, reducing the risk of identity theft. The system uses the Ethereum layer-2 network ZKsync Era as a security anchor. The government aims to share this technology with the national government and scale it nationally.



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