3. Safety policy: safety associations

IPsec security policy takes the form of security associations . In other words, initially, the two security devices (terminals, security gateways) wishing to protect their exchanges each have their own security policy, dictated by their respective security officer.

When they want to enter into communication, they must, according to their security policy, agree on the type of security header to be introduced/extracted in IP packets, as well as the security services and parameters (encryption algorithms and keys,...