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Analysis of Anonymity Services from a Tunable Perspective
Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. (PriSec)
Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. (PriSec)
Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. (DISCO)
2007 (English)In: The Future of Identity in the Information Society: Proceedings of the Third IFIP WG 9.2, 9.6/ 11.6, 11.7/FIDIS International Summer School on The Future of Identity in the Information Society, Karlstad University, Sweden / [ed] Simone Fischer-Huebner, Penny Duquenoy, Albin Zuccato, Leonardo Martucci, Boston: IFIP , 2007Conference paper, Oral presentation only (Refereed)
Abstract [en]

In this paper, we investigate the tunable features provided by Mix-Nets and Crowds using a conceptual model for tunable secu- rity services. A tunable security service is deflned as a service that has been explicitly designed to ofier various security levels that can be se- lected at run-time. Normally, Mix-Nets and Crowds are considered to be static anonymity services, since they were not explicitly designed to provide tunability. However, as discussed in this paper, they both con- tain dynamic elements that can be used to achieve a tradeofi between anonymity and performance

Place, publisher, year, edition, pages
Boston: IFIP , 2007.
Series
International Federation for Information Processing, ISSN 1571-5736 ; 262
Keyword [en]
Conceptual Model
National Category
Computer Science
Identifiers
URN: urn:nbn:se:kau:diva-1918ISBN: 978-0-387-79026-8 (print)OAI: oai:DiVA.org:kau-1918DiVA: diva2:5017
Conference
Proceedings of the IFIP WG 9.2, 9.6/11.7, 11.6/FIDIS Summer School on The Future of Identity in the Information Society, Karlstad University, Sweden, August 2007
Available from: 2007-10-09 Created: 2007-10-09 Last updated: 2012-07-23Bibliographically approved
In thesis
1. Towards Measurable and Tunable Security
Open this publication in new window or tab >>Towards Measurable and Tunable Security
2007 (English)Licentiate thesis, comprehensive summary (Other scientific)
Abstract [en]

Many security services today only provides one security configuration at run-time, and cannot then utilize the trade-off between performance and security. In order to make use of this trade-off, tunable security services providing several security configurations that can be selected at run-time are needed. To be able to make intelligent choices on which security configuration to use for different situations we need to know how good they are, i.e., we need to order the different security configurations with respect to each security attribute using measures for both security and performance.

However, a key issue with computer security is that it is due to its complex nature hard to measure.

As the title of this thesis indicates, it discusses both security measures and tunable security services. Thus, it can be seen to consist of two parts. In the first part, discussing security measures for tunable security services, an investigation on the security implications of selective encryption by using guesswork as a security measure is made. Built on this an investigation of the relationship between guesswork and entropy. The result shows that guesswork,

after a minor redefinition, is equal to the sum of the entropy and the relative entropy.

The second part contributes to the area of tunable security services, e.g., services that provides several security configurations at run-time. In particular, we present the mobile Crowds (mCrowds) system,

an anonymity technology for the mobile Internet developed at Karlstad University, and a tunable encryption service, that is based on a selective encryption paradigm and designed as a middleware. Finally, an investigation of the tunable features provided by Mix-Nets and Crowds are done, using a conceptual model for tunable security services.

Place, publisher, year, edition, pages
Fakulteten för ekonomi, kommunikation och IT, 2007
Series
Karlstad University Studies, ISSN 1403-8099 ; 2007:39
Keyword
tunable security, security measures, metrics, entropy, guesswork, privacy, anonymity, selective encryption
National Category
Computer Science
Research subject
Computer Science
Identifiers
urn:nbn:se:kau:diva-1200 (URN)978-91-7063-142-9 (ISBN)
Presentation
2007-10-23, Sjöströmsalen, 1B 309, Karlstads universitet, Karlstad, 10:00
Opponent
Supervisors
Available from: 2007-10-09 Created: 2007-10-09 Last updated: 2010-09-22

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Lundin, ReineLindskog, StefanBrunstrom, Anna

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