Hi,
Is it possible to disable the print screen button?
No, krpano is still only a browser-based script-application and not a kind of root-level-system-application that could control the whole system and block the user from taking screenshots

.
That means that's something that's generally impossible.
And is it possible to encrypt the images?
I've seen that now it's only possible to encrypt the xml. Is that true?
Right, that's true, but I'm already working on new and nice image encryption system.
Best regards,
Klaus