sbd is a Netcat-clone, designed to be portable and offer strong encryption. It runs on Unix-like operating systems and on Microsoft Win32. sbd features AES-CBC-128 + HMAC-SHA1 encryption (by Christophe Devine), program execution (-e option), choosing source port, continuous reconnection with delay, and some other nice features. Only TCP/IP communication is supported. Source code and binaries are distributed under the GNU General Public License. sbd can be used for any number of network-related things, e.g.: * Secure file transfer * Remote administration * Simple (but secure) peer-to-peer chat * Pen-test tool (crypto avoids NIDS detection and telnet-style traffic recording)