My uncle works on different projects. He sell his research in the form of office files. Like Word or Excel. Mostly they are Word files. I want some way to protect those files. Like adding the author name which no one can modify. There are many free files also, shared but I cannot see his name in that which was added at the time of creating document. Is there a way to lock it. Like no one can remove the name or site url which is in the file. I had tried to add that in footer but still it is easy to remove.
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