RFC 2953 (rfc2953) - Page 1 of 5

Telnet Encryption: DES 64 bit Output Feedback

Alternative Format: Original Text Document
Network Working Group                                             T. Ts'o
Request for Comments: 2953                               VA Linux Systems
Category: Informational                                    September 2000


             Telnet Encryption: DES 64 bit Output Feedback

Status of this Memo

   This memo provides information for the Internet community.  It does
   not specify an Internet standard of any kind.  Distribution of this
   memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2000).  All Rights Reserved.

Abstract

   This document specifies how to use the data encryption standard (DES)
   encryption algorithm in output feedback mode with the telnet
   encryption option.

1.  Command Names and Codes

   Encryption Type

      DES_OFB64        2

   Suboption Commands

      OFB64_IV         1
      OFB64_IV_OK      2
      OFB64_IV_BAD     3

2.  Command Meanings

   IAC SB ENCRYPT IS DES_OFB64 OFB64_IV  IAC SE

     The sender of this command generates a random 8 byte initial
     vector, and sends it to the other side of the connection using the
     OFB64_IV command.  The initial vector is sent in clear text.  Only
     the side of the connection that is WILL ENCRYPT may send the
     OFB64_IV command

   IAC SB ENCRYPT REPLY DES_OFB64 OFB64_IV_OK IAC SE
   IAC SB ENCRYPT REPLY DES_OFB64 OFB64_IV_BAD IAC SE




Ts'o                         Informational
Next >