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France seeks to ban social media for children under 15 (www.lemonde.fr)
submitted 10 months ago by to c/technology@beehaw.org
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[–] 2 points 10 months ago (3 children)

No ZKP system can work because someone can generate hundreds of tokens and hand them out to whoever wants one.

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  • [–] 0 points 10 months ago (2 children)

    Only the entity that owns the private key can generate signed tokens. You can read about the Danish solution, which is the first and most developed implementation of the EU’s requirements for anonymity: https://digst.dk/media/5gybwsaq/implementing-age-verification-with-danish-digital-identity-wallet-dktb-09.pdf

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  • [–] 2 points 10 months ago (1 child)

    The DKTB is a personal app. It is therefore assumed, that the User will not share it with other people, and that only the User can access and control their personal DKTB. Ultimately, this means that all attestations in a DKTB are expected to pertain to and only be presented by the same User. This is enforced by requiring the user to authenticate using biometry or PIN-code when using the app and only allowing the DKTB application to be installed on one device per user. (from the PDF)

    This is a false assumption: PIN codes can be bypassed by sharing them with others. Devices can be faked unless using hardware attestation, which prohibits any modifications to the device which may be undertaken by those interested in rooting or installing a custom OS.

    Users can initially acquire a DKTB on their smartphone or tablet via Google Play or the Apple App store. (from the PDF)

    This method requires the use of a vanilla, unmodified device, effectively prohibiting modifications to devices that one might wish to alter.

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  • [–] 1 point 10 months ago

    It may theoretically be a false assumption but in practice it’s really not. The MitID identification and signing framework of Denmark, and many other similar systems across the EU, is based entirely on “the device is personal, access to it is limited and the secure enclaves within them are trustworthy”.

    You are correct that this framework is not designed for anyone who wishes to root their device or install a custom OS. In other words, it cuts out 0.00000000001% of the population. The colour of the app has a bigger impact than “oh no! We can’t support rooted devices”.

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