NDLI: A formal approach for network security management based on qualitative risk analysis

Content Provider	IEEE Xplore Digital Library
Author	Rahman, M.A. Al-Shaer, E.
Copyright Year	2013
Description	Author affiliation: CyberDNA Res. Center, Univ. of North Carolina, Charlotte, NC, USA (Rahman, M.A.; Al-Shaer, E.)
Abstract	The risk analysis is an important process for enforcing and strengthening efficient and effective security. Due to the significant growth of the Internet, application services, and associated security attacks, information professionals face challenges in assessing risk of their networks. The assessment of risk may vary with the enterprise's requirements. Hence, a generic risk analysis technique is suitable. Moreover, configuring a network with correct security policy is a difficult problem. The assessment of risk aids in realizing necessary security policy. Risk is a function of security threat and impact. Security threats depend on the traffic reachability. Security devices like firewalls are used to selectively allow or deny traffic. However, the connection between the network risk and the security policy is not easy to establish. A small modification in the network topology or in the security policy, can change the risk significantly. It is hard to manually follow a systematic process for configuring the network towards security hardening. Hence, an automatic generation of proper security controls, e.g., firewall rules and host placements in the network topology, is crucial to keep the overall security risk low. In this paper, we first present a declarative model for the qualitative risk analysis. We consider transitive reachability, i.e., reachability considering one or more intermediate hosts, in order to compute exposure of vulnerabilities. Next, we formalize our risk analysis model and the security requirements as a constraint satisfaction problem using the satisfiability modulo theories (SMT). A solution to the problem synthesizes necessary firewall policies and host placements. We also evaluate the scalability of the proposed risk analysis technique as well as the synthesis model.
Starting Page	244
Ending Page	251
File Size	628595
Page Count	8
File Format	PDF
ISBN	9781467352291
e-ISBN	9783901882500
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-05-27
Publisher Place	Belgium
Access Restriction	Subscribed
Rights Holder	IFIP
Subject Keyword	Security Risk analysis Analytical models Network topology Measurement Internet Computational modeling
Content Type	Text
Resource Type	Article

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