Interfirewall optimization across administrative domains for enabling privacy preserving and security

Enabling security over internet, firewalls play a major role. It checks all incoming or outgoing packet to decide whether to accept or discard the packet based on its policy. Firewall optimization focuses on either intra-firewall or inter-firewall optimization within one administrative domain where the privacy of firewall policies is not a concern. Explore interfirewall optimization across administrative domains for the first time. The key technical challenge is that firewall policies cannot be shared across domains because a firewall policy contains confidential information and even potential security holes, which can be exploited by attackers. Using interfirewall redundant rule which overcome the prior problem and enable the interfirewall optimization across administrative domains. Also propose the first cross-domain cooperative firewall (CDCF) policy optimization protocol. The optimization process involves cooperative computation between the two firewalls without any party disclosing its policy to the other. We implemented our protocol in Java and conducted extensive evaluation.