HP-UX IPSec version A.02.01 Administrator's Guide

Glossary
SPI
Glossary 365
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.
SA See Security Association.
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.
Security Association (SA) A secure
communication channel and its parameters,
such as encryption and authentication
method, keys and lifetime.
Security Certificate See Certificate.
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.
SPI See Security Parameters Index.