Harden-clients gives the administrator an easy way to avoid installing clients that are insecure in some sense. It conflicts with: clients that need to send passwords in plaintext, and packages that can give someone access to the local host without permission. . NOTE! This package will not make your system uncrackable, and it is not intended to do so. Making your system secure involves a LOT more than just installing a package. . For more information on how to secure your system see: http://www.debian.org/doc/manuals/securing-debian-howto/