SBD

This is another Netcat descendant that supports encrypted channels. It provides the standard options and is under active development. If you choose to use this, be sure to change the default secret, or password, that it uses for encrypted communication. This is done with the k option or in the sbd.h file, if you'd like to modify the source code.

You can download SBD from http://tigerteam.se/software_en.shtml.