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The PPP DES Encryption Protocol, Version 2 (DESE-bis) (RFC2419)

IP.com Disclosure Number: IPCOM000002995D
Original Publication Date: 1998-Sep-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 10 page(s) / 23K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

K. Sklower: AUTHOR [+2]

Abstract

The Point-to-Point Protocol (PPP) [1] provides a standard method for transporting multi-protocol datagrams over point-to-point links.

This text was extracted from a ASCII document.
This is the abbreviated version, containing approximately 12% of the total text.

Network Working Group K. Sklower

Request for Comments: 2419 University of California, Berkeley

Obsoletes: 1969 G. Meyer

Category: Standards Track Shiva

September 1998

The PPP DES Encryption Protocol, Version 2 (DESE-bis)

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 (1998). All Rights Reserved.

Abstract

The Point-to-Point Protocol (PPP) [1] provides a standard method for

transporting multi-protocol datagrams over point-to-point links.

The PPP Encryption Control Protocol (ECP) [2] provides a method to

negotiate and utilize encryption protocols over PPP encapsulated

links.

This document provides specific details for the use of the DES

standard [5, 6] for encrypting PPP encapsulated packets.

Acknowledgements

The authors extend hearty thanks to Fred Baker of Cisco, Philip

Rakity of Flowpoint, and William Simpson of Daydreamer for helpful

improvements to the clarity and correctness of the document.

Table of Contents

1. Introduction ................................................ 2

1.1. Motivation ................................................ 2

1.2. Conventions ............................................... 2

2. General Overview ............................................ 2

3. Structure of This Specification ............................. 4

4. DESE Configuration Option for ECP ........................... 4

5. Packet Format for DESE ...................................... 5

6. Encryption .................................................. 6

6.1. Padding Considerations .................................... 7

6.2. Generation of the Ciphertext .............................. 8

6.3. Retrieval of the Plaintext ................................ 8

6.4. Recovery after Packet Loss ................................ 8

7. MRU Considerations .......................................... 9

8. Differences from RFC 1969 ................................... 9

8.1. When to Pad ............................................... 9

8.2. Assigned Numbers .......................................... 9

8.3. Minor Editori...