Concordium launches its age verification app using zero-knowledge proofs, offering privacy-friendly compliance amid UK’s new online ID rules.
Author: Akshat Thakur
August 19, 2025 — Layer-1 blockchain Concordium has launched a mobile application designed to provide anonymous age checks using zero-knowledge proofs. The new Concordium age verification app arrives as the UK’s new online age verification rules face backlash from privacy advocates.
The Concordium age verification app uses zero-knowledge proofs, a cryptographic method allowing users to confirm information without exposing personal details. Available on iOS and Android, the app generates an encrypted ID that can be used on integrated third-party services.
According to Concordium, users can verify attributes such as date of birth and nationality, but these details remain hidden from service providers. Instead, ZK-proofs confirm that a user meets specific requirements, such as being over 18, without sharing sensitive documents.
The introduction of the Concordium age verification app coincides with the UK’s new mandatory online ID checks for accessing adult content. Critics argue that these measures endanger user privacy, leading to increased VPN usage across the country.
Ofcom, the UK’s communications regulator, has clarified that reusable digital ID wallets are a valid form of compliance, provided they meet high privacy and effectiveness standards. Concordium has confirmed that it is in active discussions with Ofcom regarding its solution.
Zero-knowledge proof technology is already widely used in the cryptocurrency sector, with projects like Zcash and Tornado Cash employing it for anonymous transfers. The concept is now gaining traction in mainstream digital identity systems.
Google Wallet recently integrated ZK-proofs for age verification, further highlighting growing interest in privacy-preserving technology. Concordium’s new app positions itself as a blockchain-backed alternative that balances regulatory compliance with data protection.
The Concordium age verification app reflects growing demand for privacy-first digital identity solutions as governments impose stricter verification measures. By combining zero-knowledge proofs with blockchain, Concordium aims to provide a balance between compliance and user protection at a time when online privacy remains a global concern.
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