[[!comment format=mdwn
 username="http://joeyh.name/"
 ip="209.250.56.7"
 subject="comment 1"
 date="2014-08-15T17:32:15Z"
 content="""
I don't see much difference between (mtime, size, location) and (mtime, size) as far as entropy goes. Consider: A repository with all files in a single directory in the top level is going to have identical probabilities of collision either way. A less special case of a repository that typically has files added to it in a particular directory (\"inbox\", say), is again going to have identical probabilities of collision.

If you're worried about such collisions, you should not be using WORM. I think that the documentation for it is pretty clear.

If we really wanted to increase the entropy of worm, we could add a random number to the key, or perhaps the file's (original) inode number.
"""]]