For added security, you can use an HSM to
secure the private keys used in SSL/TLS decryption for:
SSL
Forward Proxy—The HSM can store the private key of the Forward
Trust certificate that signs certificates in SSL/TLS forward proxy
operations. The firewall will then send the certificates that it generates
during such operations to the HSM for signing before forwarding
the certificates to the client.
SSL
Inbound Inspection—The HSM can store the private keys for
the internal servers for which you are performing SSL/TLS inbound inspection.
If
you use the DHE or ECDHE key exchange algorithms to enable perfect forward
secrecy (PFS) support for SSL decryption, you can use an HSM to
store the private keys for SSL Inbound Inspection. You can also
use an HSM to store ECDSA keys used for SSL Forward Proxy or SSL
Inbound Inspection decryption.