I'm going to be distributing some of my images as TIFF files and want to put my copyright and contact information into the metadata for the images in a way that prevents it being stripped or altered by third parties. At the moment I'm using Photoshop CS5 and inserting the information using Bridge. Is there a method for locking the metadata that anyone can recommend?
Anyone with an editor can open a TIFF and save it again without the metadata. I don't think there is any way to lock the metadata from being stripped out.
You could look at digital watermarking, such as Digimarc