Re: md5 collision

Unruh wrote:

> In the first case neither of the two files is known
> beforehand. In the second one is.

When dealing with the first case, you create the first of the two files,
then the file IS known. Then you would be dealing with the second case.
Unless you create both files at the same time, there is no way the first
case can happen. You will always have a known file after the creation of
the first file and only the second case would be applicable after the
creation of the first file.