Secure Shell
Secure Shell (or SSH) is a network protocol that allows data to be exchanged using a secure channel between two networked devices. Secure Shell uses GNU ZLIB (LZ77) for compression. Compression uses less bandwidth and CPU ratios winds up faster overall. It's supported by CAO and CDO.
If you're on *NIX and are tired of entering passwords for the main SSH login, then copy sorear's $HOME/.ssh/config. The ssh_key that might be needed is available at http://crawl.akrasiac.org/cao_key
