Currently, I am working on the encryption of line-ups. The idea is to send an encrypted message to the backend. This message includes the encrypted line-up as well as an encrypted key, with which the line up can be decrypted. The key can be decrypted by the backend server with its private key. Later on, the results of the match will be published and that also includes the encryption key, so that people can verify that everything was as expected.
It turned out, that this is easier said than made. So far, I have been able to encrypt everything on the frontend side, but I have not managed to do decrypt it in the backend, as Javascript and Python seem not so easy to get to understand the encryption. But I will figure this out and then the problem should be solved. Just takes a bit of time...