Will the SecTrace guest passes which I have scanned be cached on my mobile device?
No, they are transmitted immediately.
When and where can my data as a guest be viewed?
The guest's data is encrypted in the QR code that he creates for himself. When visiting a restaurant, for example, the QR code is scanned by the host. Now both the guest's and the host's encrypted data are encrypted again together and stored in trust for the first time. Only in the case of infection,
What do I do if my address has changed?
Since the data of a guest is stored exclusively in the QR code, please create a new SecTrace Pass and use only this one from now on.
How and where is my data stored when I fill out the QR code form on the SecTrace site?
The data entered in the form is used directly to create an encrypted QR code. The data is therefore not stored anywhere except in this QR code (and there only encrypted).