Browse Prior Art Database

The PPP DES Encryption Protocol (DESE) (RFC1969)

IP.com Disclosure Number: IPCOM000004256D
Original Publication Date: 1996-Jun-01
Included in the Prior Art Database: 2000-Sep-13
Document File: 8 page(s) / 19K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

K. Sklower & G. Meyer: AUTHOR

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 14% of the total text.

Network Working Group K. Sklower

Request for Comments: 1969 University of California, Berkeley

Category: Informational G. Meyer

Spider Systems

June 1996

The PPP DES Encryption Protocol (DESE)

Status of This Memo

This memo provides information for the Internet community. This memo

does not specify an Internet standard of any kind. Distribution of

this memo is unlimited.

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 for helpful

improvements to the clarity 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 ............................. 3

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

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

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

6.1. Padding Considerations .................................... 6

6.2. Generation of the Ciphertext .............................. 7

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

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

7. MRU Considerations .......................................... 8

8. Security Considerations ..................................... 9

9. References .................................................. 9

10. Authors' Addresses ......................................... 10

11. Expiration Date of this Draft .............................. 10

1. Introduction

1.1. Motivation

The purpose of this memo is two-fold: to show how one specifies the

necessary details of a "data" or "bearer" protocol given the context

of the generic PPP Encryption Control Protocol, and also to provide

at least one co...