Age assurance: eID, wallets and age estimation compared
Blog post from Didit
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Age assurance encompasses methods for determining users’ ages online, ranging from ineffective self-declaration to facial age estimation and more certain verification through national eIDs, digital wallets, or identity documents. The text distinguishes estimation, which approximates age from a selfie and must account for error margins, from verification, which can establish age or an over-18 status with greater certainty. It recommends a “waterfall” approach where facial estimation is used first with a challenge age above the legal threshold, such as 25 for 18+ access, and borderline users are redirected to eID, wallet, or document-based verification. Regulations differ by region: the UK permits highly effective facial estimation with a challenge age, while EU guidance generally requires verification for adult-restricted services such as pornography, gambling, and alcohol sales, with limited transitional exceptions for estimation. Privacy-focused EU age-app and wallet initiatives aim to let users prove they are over 18 through one-time, identity-free credentials, while international standards and regulatory guidance emphasize data minimization, alternative methods for rejected users, and retention of only the age result rather than identity documents.
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