I wonder, Could someone advise me.
I need something like this in the education area in reference to content source and plagiarism.

Would it be possible to create a node that holds information that cannot be deleted.
The node would then be encrypted so that a password would be needed to edit or delete the node?
It would not have any other effect on the scene, the information could be made readable or not.
Is it bad pracice to invent such a node?, can’t see many problems at first sight.

cheers
geoff

I have worked on this kind of problem, but I haven’t even seen a system that I couldn’t crack (which is sort of the nowhere-near-good-enough benchmark). You can make it difficult for someone who’s not very determined by creating scriptJobs that will prevent deletion of nodes by shutting Maya down if tampered with and stuff, but as soon as you have access to a file, you can write stuff out. And even if I had watermarked an object, creating a duplicate is pretty easy. One solution you might want to consider would be to create your own geometry node type that requires a plug-in that you can protect with a license. If you don’t have the plug-in, you can read the file, but you won’t be able to access the geometry.