The Buenos Aires government has recently introduced a new feature into its city app to enhance privacy for its residents. This feature, called zero-knowledge proofs (ZK proofs), allows users to verify information without revealing sensitive data. For example, residents can prove their age without disclosing their birthdate, providing an extra layer of privacy and security.
The technology behind ZK proofs has been around for some time and is now being tested in other regions, such as Uruguay. By incorporating this feature into the city’s app, Buenos Aires aims to give its 3.6 million residents more control over their personal information.
One key aspect of this new digital identity service, called QuarkID, is the use of a blockchain technology called Ethereum layer-2 network ZKsync Era. This blockchain serves as a security anchor, ensuring the authenticity of data at a specific point in time. By utilizing this technology, residents can securely upload various documents to the app, such as birth certificates and vaccination records.
In addition to enhancing privacy, the implementation of ZK proofs also reduces the risk of identity theft, as no third party, not even the government, has control over these documents. This means that residents can feel confident that their information is safe and protected from potential cyber threats.
Moreover, the cost of using this new technology is significantly lower compared to traditional methods, benefiting both users and the government. The city of Buenos Aires plans to expand the use of ZK proofs to other regions in Argentina, with the possibility of scaling nationally in the future.
Overall, the integration of ZK proofs into the Buenos Aires city app represents a significant step towards improving privacy and security for residents. By leveraging blockchain technology and innovative cryptographic techniques, the city aims to provide a more secure and user-friendly experience for its citizens.
