Zero-knowledge (ZK) proofs are a popular method for creating decentralized identity products, allowing verification of information without revealing specific content. However, Ingo Rübe, CEO of KILT Protocol, mentioned that the technical complexity of ZK-proofs makes adoption challenging for governments and institutions.
In an interview with Cointelegraph, Rübe explained that decentralized identification data, such as biometric data, can be selectively shared and verified on-chain using Merkle Trees, a data structure familiar to computer scientists. He also raised concerns about potential data breaches due to the open source software used in ZK solutions.
Rübe suggested using public, permissionless blockchains to store credential validity and emphasized the importance of users owning and creating their digital credentials. These credentials can be locally stored and verified using decentralized blockchain networks.
Decentralized identity solutions offer a glimpse into the future of identification, with varying approaches catering to different use cases. While ZK proofs are one option, Rübe likened using them for decentralized identity to using a bazooka to kill a fly.
Despite technical challenges, companies and governments are exploring ZK-powered identity solutions. For example, Buenos Aires announced the rollout of decentralized identification for residents in October 2024. Additionally, World (formerly Worldcoin) unveiled the next generation of biometric data-collecting spheres and introduced the World ID Credentials program for identity verification.
Overall, decentralized identity solutions are evolving to meet the growing demand for secure and user-controlled identification processes.
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