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Documents authored by Nielson, Flemming

Document
DOI: 10.4230/LIPIcs.TIME.2017.21
Time Dependent Policy-Based Access Control

Authors: Panagiotis Vasilikos, Flemming Nielson, and Hanne Riis Nielson

Published in: LIPIcs, Volume 90, 24th International Symposium on Temporal Representation and Reasoning (TIME 2017)

Abstract
Access control policies are essential to determine who is allowed to access data in a system without compromising the data's security. However, applications inside a distributed environment may require those policies to be dependent on the actual content of the data, the flow of information, while also on other attributes of the environment such as the time. In this paper, we use systems of Timed Automata to model distributed systems and we present a logic in which one can express time-dependent policies for access control. We show how a fragment of our logic can be reduced to a logic that current model checkers for Timed Automata such as UPPAAL can handle and we present a translator that performs this reduction. We then use our translator and UPPAAL to enforce time-dependent policy-based access control on an example application from the aerospace industry.
Cite as

Panagiotis Vasilikos, Flemming Nielson, and Hanne Riis Nielson. Time Dependent Policy-Based Access Control. In 24th International Symposium on Temporal Representation and Reasoning (TIME 2017). Leibniz International Proceedings in Informatics (LIPIcs), Volume 90, pp. 21:1-21:18, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2017)

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@InProceedings{vasilikos_et_al:LIPIcs.TIME.2017.21,
  author =	{Vasilikos, Panagiotis and Nielson, Flemming and Nielson, Hanne Riis},
  title =	{{Time Dependent Policy-Based Access Control}},
  booktitle =	{24th International Symposium on Temporal Representation and Reasoning (TIME 2017)},
  pages =	{21:1--21:18},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-052-1},
  ISSN =	{1868-8969},
  year =	{2017},
  volume =	{90},
  editor =	{Schewe, Sven and Schneider, Thomas and Wijsen, Jef},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.TIME.2017.21},
  URN =		{urn:nbn:de:0030-drops-79219},
  doi =		{10.4230/LIPIcs.TIME.2017.21},
  annote =	{Keywords: Access Control, Timed Automata, Time-Dependent Policies, UPPAAL}
}
Document
DOI: 10.4230/DagSemProc.06161.6
Context Dependent Analysis of BioAmbients

Authors: Henrik Pilegaard, Hanne Riis-Nielson, and Flemming Nielson

Published in: Dagstuhl Seminar Proceedings, Volume 6161, Simulation and Verification of Dynamic Systems (2006)

Abstract
BioAmbients is a derivative of mobile ambients that has shown promise of describing interesting features of the behaviour of biological systems. The technical contribution of this paper is to extend the Flow Logic approach to static analysis with a couple of new techniques in order to give precise information about the behaviour of systems written in BioAmbients. Applying the development to a simple model of a cell releasing nutrients from food compunds we illustrate how the proposed analysis does indeed improve on previous efforts.
Cite as

Henrik Pilegaard, Hanne Riis-Nielson, and Flemming Nielson. Context Dependent Analysis of BioAmbients. In Simulation and Verification of Dynamic Systems. Dagstuhl Seminar Proceedings, Volume 6161, pp. 1-18, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2006)

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@InProceedings{pilegaard_et_al:DagSemProc.06161.6,
  author =	{Pilegaard, Henrik and Riis-Nielson, Hanne and Nielson, Flemming},
  title =	{{Context Dependent Analysis of BioAmbients}},
  booktitle =	{Simulation and Verification of Dynamic Systems},
  pages =	{1--18},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2006},
  volume =	{6161},
  editor =	{David M. Nicol and Corrado Priami and Hanne Riis Nielson and Adelinde M. Uhrmacher},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.06161.6},
  URN =		{urn:nbn:de:0030-drops-7093},
  doi =		{10.4230/DagSemProc.06161.6},
  annote =	{Keywords: Static analysis, abstract interpretation, BioAmbients}
}
Document
DOI: 10.4230/DagSemProc.06161.3
06161 Working Groups' Report: The Challlenge of Combining Simulation and Verification

Authors: Gregory Batt, Jeremy T. Bradley, Roland Ewald, François Fages, Holger Hermans, Jane Hillston, Peter Kemper, Alke Martens, Pieter Mosterman, Flemming Nielson, Oleg Sokolsky, and Adelinde M. Uhrmacher

Published in: Dagstuhl Seminar Proceedings, Volume 6161, Simulation and Verification of Dynamic Systems (2006)

Abstract
Simulation has found widespread use for experimentation and exploration of the possible impacts of a variety of conditions on a system. In contrast, formal verification is concerned with proving or disproving the correctness of a system with respect to a certain property, using mathematical and logical methods.
Cite as

Gregory Batt, Jeremy T. Bradley, Roland Ewald, François Fages, Holger Hermans, Jane Hillston, Peter Kemper, Alke Martens, Pieter Mosterman, Flemming Nielson, Oleg Sokolsky, and Adelinde M. Uhrmacher. 06161 Working Groups' Report: The Challlenge of Combining Simulation and Verification. In Simulation and Verification of Dynamic Systems. Dagstuhl Seminar Proceedings, Volume 6161, pp. 1-21, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2006)

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@InProceedings{batt_et_al:DagSemProc.06161.3,
  author =	{Batt, Gregory and Bradley, Jeremy T. and Ewald, Roland and Fages, Fran\c{c}ois and Hermans, Holger and Hillston, Jane and Kemper, Peter and Martens, Alke and Mosterman, Pieter and Nielson, Flemming and Sokolsky, Oleg and Uhrmacher, Adelinde M.},
  title =	{{06161 Working Groups' Report: The Challlenge of Combining Simulation and Verification}},
  booktitle =	{Simulation and Verification of Dynamic Systems},
  pages =	{1--21},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2006},
  volume =	{6161},
  editor =	{David M. Nicol and Corrado Priami and Hanne Riis Nielson and Adelinde M. Uhrmacher},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.06161.3},
  URN =		{urn:nbn:de:0030-drops-7249},
  doi =		{10.4230/DagSemProc.06161.3},
  annote =	{Keywords: Modelling, Simulation, Verification, Systemsbiology}
}
Document
DOI: 10.4230/DagSemProc.06161.9
Static Analysis of a Model of the LDL Degradation Pathway

Authors: Henrik Pilegaard, Hanne Riis-Nielson, and Flemming Nielson

Published in: Dagstuhl Seminar Proceedings, Volume 6161, Simulation and Verification of Dynamic Systems (2006)

Abstract
BioAmbients is a derivative of mobile ambients that has shown promise of describing interesting features of the behaviour of biological systems. As for other ambient calculi static program analysis can be used to compute safe approximations of the behaviour of system models. We use these tools to model and analyse the production of cholesterol in living cells and show that we are able to pinpoint the difference in behaviour between models of healthy systems and models of mutated systems giving rise to known diseases.
Cite as

Henrik Pilegaard, Hanne Riis-Nielson, and Flemming Nielson. Static Analysis of a Model of the LDL Degradation Pathway. In Simulation and Verification of Dynamic Systems. Dagstuhl Seminar Proceedings, Volume 6161, pp. 1-13, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2006)

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@InProceedings{pilegaard_et_al:DagSemProc.06161.9,
  author =	{Pilegaard, Henrik and Riis-Nielson, Hanne and Nielson, Flemming},
  title =	{{Static Analysis of a Model of the LDL Degradation Pathway}},
  booktitle =	{Simulation and Verification of Dynamic Systems},
  pages =	{1--13},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2006},
  volume =	{6161},
  editor =	{David M. Nicol and Corrado Priami and Hanne Riis Nielson and Adelinde M. Uhrmacher},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.06161.9},
  URN =		{urn:nbn:de:0030-drops-7230},
  doi =		{10.4230/DagSemProc.06161.9},
  annote =	{Keywords: Static analysis, Systems Biology, BioAmbients, LDL Degradation Pathway}
}
Document
DOI: 10.4230/DagSemRep.294
Security through Analysis and Verification (Dagstuhl Seminar 00501)

Authors: Pierpaolo Degano, Roberto Gorrieri, Chris Hankin, Flemming Nielson, and Hanne Riis Nielson

Published in: Dagstuhl Seminar Reports. Dagstuhl Seminar Reports, Volume 1 (2021)

Abstract
Cite as

Pierpaolo Degano, Roberto Gorrieri, Chris Hankin, Flemming Nielson, and Hanne Riis Nielson. Security through Analysis and Verification (Dagstuhl Seminar 00501). Dagstuhl Seminar Report 294, pp. 1-15, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2001)

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@TechReport{degano_et_al:DagSemRep.294,
  author =	{Degano, Pierpaolo and Gorrieri, Roberto and Hankin, Chris and Nielson, Flemming and Riis Nielson, Hanne},
  title =	{{Security through Analysis and Verification (Dagstuhl Seminar 00501)}},
  pages =	{1--15},
  ISSN =	{1619-0203},
  year =	{2001},
  type = 	{Dagstuhl Seminar Report},
  number =	{294},
  institution =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemRep.294},
  URN =		{urn:nbn:de:0030-drops-151781},
  doi =		{10.4230/DagSemRep.294},
}
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