On: NSW Digital Driver Licence

[Nextgrid]

Not really. If the offline license is in a digital format (QR code, etc) it can still be checked whether it’s been signed by a trusted authority (the state’s digital certificate, etc).

So you can very well have an offline system where the documents are signed during enrolment but then stored offline.

[mkj → Nextgrid]

Only if the trusted authority sends back a copy of all the details too, and person at the counter looks at those instead.

Otherwise the altered app can show a different photo to that which was enrolled, etc. The signature is on bytes, not the offline visual representation.

[angry_octet → Nextgrid]

Unfortunately that does not seem to be what they have done, i.e. no signatures involved.

[Nextgrid → angry_octet]

In this case it’s a problem with the current implementation, but does not prevent a proper implementation from existing in the future.