The Firewall again validates this request and talks to the credit union data base on its secret port for its secret address. Provided the request has followed the above listed steps, the credit union data base then receives the request for data. All ports and IP addresses used behind the Firewall are private and can not be routed via the Internet. Therefore, no communication is ever possible between the Internet and the credit union's private data base. Through the use of blanketed network monitoring, the Application Firewall stands guard over the entire network, notifying the system administrator of any attempts of unauthorized access or hacking.
Every transaction is audited and contains all network information.
This allows the Application Firewall to act as an effective phone tap and tracing tool. Public key encryption is a technique that uses a pair of asymmetric keys for encryption and decryption. One is called the public key, and one is called the private key. The public key is made public by distributing it widely. The private key is never distributed and is always kept secret.