http://www.rfc-editor.org/rfc/rfc2948.txt
RFC 2948: Telnet Encryption: DES3 64 bit Output Feedback, J. Altman2000-09-01T23:00:00-00:00This document specifies how to use the Triple-DES (data encryption standard) encryption algorithm in output feedback mode with the telnet encryption option. [STANDARDS-TRACK]