This package provides two small programs, give and take (obviously). These two small programs enable your users to give/take files to/from other users. To decide if the user should be able to give/take other users file(s), PAM is used, in other words you can use whatever authentication method you want.
There is examples and documentation in the tar-ball! :) Also, the source of these two small programs are very small, roughly 100 lines so it should be easy to audit. It also is quite heavily commented (source + comments = 100 lines, so you will still survive).
Written by Asbjørn Sannes (ace AT sannes DOT org) and Christian Skarby.
Non that I know of, please e-mail me if you do.
Only tested on GNU/Linux, should work on most UNIX like platforms that have PAM (Linux, Solaris? *BSD?).