A roadmap towards improving managed security services from a privacy perspective
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This paper proposes a roadmap for how privacy leakages from outsourced managed security services using intrusion detection systems can be controlled. The paper first analyses the risk of leaking private or confidential information from signature-based intrusion detection systems. It then discusses how the situation can be improved by developing adequate privacy enforcement methods and privacy leakage metrics in order to control and reduce the leakage of private and confidential information over time. Such metrics should allow for quantifying how much information that is leaking, where these information leakages are, as well as showing what these leakages mean. This includes adding enforcement mechanisms ensuring that operation on sensitive information is transparent and auditable. The data controller or external quality assurance organisations can then verify or certify that the security operation operates in a privacy friendly manner. The roadmap furthermore outlines how privacy-enhanced intrusion detection systems should be implemented by initially providing privacy-enhanced alarm handling and then gradually extending support for privacy enhancing operation to other areas like digital forensics, exchange of threat information and big data analytics based attack detection.
KeywordsSecurity Privacy Outsourcing Intrusion detection and prevention systems Managed security services Ethical awareness
Thanks to all anonymous reviewers, for challenging questions and good ideas on how to improve the quality of the paper. This work has been partially supported by the project “PRECYSE - Protection, prevention and reaction to cyber-attacks to critical infrastructures”, funded by the European Commission under the FP7 frame programme with contract number FP7-SEC-2012-1-285181 (www.precyse.eu), and partially by Telenor Research and Innovation under the contract DR-2009-1.
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