secure delete?

[Peter Foldiak]

Is there a way to securely delete a file or directory in ReiserFS or
Reiser4? By "securely delete" I mean the kind of thing one of the PGP
tools tries to do (i.e. overwrite the disk area with random bits several
times). Of course this only works if the information is not moved around
physically a lot (i.e. at all). Could secure delete work? Peter