Glossary

SPI – Security Parameters Index
# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

SPI – Security Parameters Index

The SPI (Security Parameters Index) is a pointer that references the session key and algorithms used to protect the data being transported. The index is defined during the SA (Security Association) establishment and described in the ESP (Encapsulating Security Protocol) or AH (Authentication Header) extension to the IP header.


< Back to glossary

Need more information? Want to know more about what we do?
Contact Us or Call +44 (0) 1524 844669

Working together with