Introduce cygwin1.dll , bskss.exe and bsksc.exe in C:\WINDOWS\system32\ or C:\WINNT\system32\ and then use MSDOS to handle the exe files bskss and bsksc bskss is the server bsksc in the client The server uses port 7000/tcp by default. Use source code to modify this. The usage is simple PEER 1: C:\> bskss PEER 2: C:\> bsksc IP.OF.PEER.1 After PEER 2 connect you will get a "shared secret" That is a password that can be securely use by both parties to encrypt information. more info in README file beck@math.co.ro