HP-UX IPSec Version A.03.00 Administrator's Guide

Security
Parameters Index
(SPI)
A numerical index used with the source IP address to identify a Security Association (SA) on
the receiving system. Each SPI and source IP address pair must be unique on the receiving
system.
SHA1 (Secure Hash Algorithm-1). Authentication algorithm that generates a 160-bit message digest
using a 160-bit key. IPsec truncates the message digest to 96 bits.
SPI See Security Parameters Index..
transform A transform defines the IPsec action(s) to be taken on the IP data, such as passing the data in
clear text, discarding the data, authenticating and encrypting the data using ESP, or
authenticating the data using AH.
252 Glossary