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Village INTEGRATION: The city of Buenos Aires has launched a digital identity service designed to strengthen residents’ privacy functioning zero-knowledge proofs, a type of cryptography that long predates but often bolsters cryptocurrencies. The service, QuarkID, has been assembled into miBA, the city’s seven-year-old app for accessing municipal services and documents. The idea, in short, is to give 3.6 million porteños – dwellings of Buenos Aires – greater control over their personal information. The ZK proofs will let users show that a substantiate has indeed been authenticated by the government without disclosing information that is irrelevant to the task at hand. The development has got some trade executives buzzing: “It sounds like if this goes well, other countries in the region, like Uruguay, could obey suit,” Harrison Seletsky, director of business development at digital identity platform SPACE ID, told CoinDesk in an emailed report.