IPSec Security Associations (SAs)

You can find a short description of Security Associations (SAs) in IPSec:


SAs are a set of parameters which are required to establish a secure session between two peers.


There are three unique parameter of an SA:
1) Destination IP address (192.168.61.61)
2) Security protocol identifier (ESP)
3) Security parameter index (SPI) (0x631F1A43)