Buenos Aires, the vibrant capital of Argentina, has taken a significant step towards enhancing the privacy and security of its citizens by integrating zero-knowledge proof technology into its city services app, miBA. This integration marks a groundbreaking innovation in the digital services landscape, offering users a secure and efficient way to access municipal services and documentation. Zero-knowledge proofs, a revolutionary cryptographic technique, empower users to demonstrate the validity of specific information without disclosing the underlying details. This cutting-edge technology safeguards sensitive personal information while ensuring transparency and accountability. By leveraging zero-knowledge proofs, miBA users can seamlessly prove their eligibility for various services without compromising their privacy. The integration of QuarkID, a reputable zero-knowledge proof provider, into miBA further solidifies the app's commitment to user data protection. QuarkID's advanced technology enables users to verify their identity, age, and other attributes without revealing their personal information. This eliminates the risk of data breaches and identity theft, providing peace of mind to citizens. Buenos Aires' embrace of zero-knowledge proof technology sets an exemplary precedent for cities worldwide. By prioritizing citizen privacy and security, the government demonstrates its commitment to building a transparent and trustworthy digital ecosystem for its residents. As more cities explore the potential of this groundbreaking technology, the future of digital services will undoubtedly be shaped by the principles of privacy, security, and user empowerment.