neil_g said:what properties? file attributes or image info.. etc
neil_g said:is this a file that is going to live on a hard drive or given out?
DemiLion said:If you mean copyright and usage info in IPTC and Exif then you can't. All someone has to do is drag it into an editing program, change the details and resave it.
AFAIK no.
You could just copy the image out and change those details.
However, you can get security kits, which will show 'errors' if the details have been changed.
But again, there is nothing to stop someone copying the image out without the verification details.
neil_g said:if it was a file staying on a local computer it may have been possible via ownership and permissions.
but if its a file that is going out on CD etc then its extremely easy to change stuff like that im afraid.