That's the cool part, they found a way to keep it anonymous and still be ID verification, it's called a white card, a simple yes or no if you're 18+, it's like you get a simple white card from a verified institution like a bank saying you're 18+ with no other information like... How is that not anonymous?
Search for zero-knowledge proof, and the techniques behind it
Whatsapp is less safe than this
Sources for ZKP: https://ageverification.dev/av-doc-technical-specification/docs/annexes/annex-B/annex-B-zkp/
https://en.wikipedia.org/wiki/Elliptic_Curve_Digital_Signature_Algorithm
Vulnerabilities: https://www.encryptionconsulting.com/education-center/what-is-ecdsa/
[Api2025] Rutchathon Chairattana-Apirom, Franklin Harding, Anna Lysyanskaya, and Stefano Tessaro, “Server-Aided Anonymous Credentials,” available at https://eprint.iacr.org/2025/513, 2025
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