Buenos Aires introduces pioneering blockchain-based digital identity for 3.6 million residents
This initiative positions Argentina as a global model in modernising identity verification processes.

Argentina launched QuarkID, an innovative blockchain-based digital identity system designed to enhance privacy and security for its 3.6 million citizens in Buenos Aires. The pioneering initiative marks a significant milestone as the world’s first government-backed decentralised identity system.
By utilising advanced zero-knowledge (ZK) cryptography through the ZKsync-powered Era layer 2 blockchain, QuarkID enables users to verify their identities without exposing sensitive personal data. Moreover, the system is integrated into the existing MiBa digital platform, allowing residents to securely manage and share verified documents such as birth certificates and tax records.
Starting on 1 October, all MiBa users received decentralised digital identities (DIDs), which empower them to confirm their identity without disclosing unnecessary personal details. Furthermore, with plans for future expansion to include additional documents like driver’s licenses and public permits, QuarkID demonstrates the Argentine government’s commitment to improving public services and setting a new standard for personal data ownership.
Why does it matter?
Argentina launched this initiative to enhance privacy and security and position itself as a model for global initiatives aimed at modernising identity verification processes. Consequently, the success of QuarkID could provide valuable insights and frameworks for other countries exploring the benefits of blockchain technology in digital identity management. By prioritising privacy, security, and user control, Argentina is thus setting a precedent for how digital identities can be effectively managed in the future, ultimately empowering citizens and revolutionising how personal data is handled.