Network Working Group P. Karn Request for Comments: 1851 Qualcomm Category: Experimental P. Metzger Piermont W. Simpson Daydreamer September 1995 The ESP Triple DES Transform Status of this Memo This document defines an Experimental Protocol for the Internet community. This does not specify an Internet standard of any kind. Discussion and suggestions for improvement are requested. Distribution of this memo is unlimited. Abstract This document describes the Triple DES-CBC security transform for the IP Encapsulating Security Payload (ESP). Table of Contents 1. Introduction .......................................... 2 1.1 Keys ............................................ 2 1.2 Initialization Vector ........................... 2 1.3 Data Size ....................................... 3 1.4 Performance ..................................... 3 2. Payload Format ........................................ 4 3. Algorithm ............................................. 6 3.1 Encryption ...................................... 6 3.2 Decryption ...................................... 7 SECURITY CONSIDERATIONS ...................................... 7 ACKNOWLEDGEMENTS ............................................. 8 REFERENCES ................................................... 9 AUTHOR'S ADDRESS ............................................. 11 Karn, et al Experimental