RFC 2948 (rfc2948) - Page 1 of 6


Telnet Encryption: DES3 64 bit Output Feedback



Alternative Format: Original Text Document



Network Working Group                                          J. Altman
Request for Comments: 2948                           Columbia University
Category: Standards Track                                 September 2000


             Telnet Encryption: DES3 64 bit Output Feedback

Status of this Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  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 Triple-DES (data encryption
   standard) encryption algorithm in output feedback mode with the
   telnet encryption option.

1.  Command Names and Codes

   Encryption Type

      DES3_OFB64       4

   Suboption Commands

      OFB64_IV         1
      OFB64_IV_OK      2
      OFB64_IV_BAD     3

2.  Command Meanings

   IAC SB ENCRYPT IS DES3_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.





Altman                      Standards Track