
Backup files can be a very interesting find from a security perspective. In
some cases, backup files are older versions of an original file.This is evidenced in
Figure 3.17.Take a look at the date of the index.htm file.The date is listed as
January 19, 2004. Now take a look at the backup copy, index.htm.bak.That file’s
date is listed as January 9, 2002. Without even viewing these files, we can tell that
they are most likely very different, since there are more than two years’ difference
in the dates. Older files are not necessarily less secure than newer versions, but
backup files on the Web have an interesting side effect:They have a tendency to
reveal source ...