...eavesdropping.
This is a very real problem. Software to do this on an ethernet is readily available for personal computers, and is actually shipped as a diagnostic tool on many UNIX workstations.

...SmartDisk
SmartDisk is a trademark of SmartDisk Security Corporation, and is now marketed by Fischer International.

Kevin S. McCurley
Sat Mar 11 16:00:15 MST 1995