Martin Grap

[Here](https://github.com/lucaapp/security-concept/blob/main/content/processes/guest_self_checkin.md#check-in-via-the-guest-app) it is said that: ``` In the conventional Check-In process this data would now be encoded into a QR code and presented to a Scanner Frontend to finish up...

Given the [Security Objectives](https://github.com/lucaapp/security-concept/blob/main/content/properties/objectives.md) O1, O2 and O3 it may be impossible to prevent dishonest users from creating fake check ins as described above.

I understand that there exists a tradeoff between different goals, i.e. your security objectives and the wish to improve the quality of contact tracing Information when compared to the current...