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1

دورية أكاديمية

Making identity assurance and authentication strength work for federated infrastructures

المؤلفون: Ziegler, J. A., Stevanovic, U., Groep, D., Neilson, I., Kelsey, D. P., Kremers, M.

المصدر: ISSN: 1824-8039.

مصطلحات موضوعية: ddc:620, Engineering & allied operations, info:eu-repo/classification/ddc/620

الوصف: In both higher Research and Education (R&E) as well as in research-/ e-infrastructures (in short: infrastructures), federated access and single sign-on by way of national federations, operated in most cases by NRENs, are used as a means to provide users with access to a variety of services. Whereas in national federations institutional accounts, e.g. provided by a university, are typically used to access services, many infrastructures also accept other sources of identity: provided by ''community identity providers'', social identity providers, or governmental IDs. In order to assess and communicate the quality of identities being used and authentications being performed, so called Level of Assurance (LoA) frameworks are used. Because sophisticated LoA frameworks like NIST 800-63-3, Kantara IAF 1420 or eIDAS regulation are often considered too complex to be used in R&E scenarios, the REFEDS Assurance Suite, a more lightweight approach, has been developed. To select an appropriate assurance level, Service Providers need to weigh risks and potential harms in relation to the kind of service they offer. However, the management of risks is often implicitly assumed and little or no guidance to determine the appropriate assurance level is given. In this paper, first, common LoA frameworks and their relation to risk management are investigated. Following that, their components are compared against the REFEDS Assurance Suite using a graphical representation. The focus of this paper lies in providing guidance and best practices based on example scenarios for both Service Providers to request the appropriate REFEDS assurance level, as well as for Identity Provider operators on how to implement REFEDS assurance components.

وصف الملف: application/pdf

العلاقة: Proceedings of Science; info:eu-repo/semantics/altIdentifier/issn/1824-8039; https://publikationen.bibliothek.kit.edu/1000140364Test; https://publikationen.bibliothek.kit.edu/1000140364/134403588Test; https://doi.org/10.5445/IR/1000140364Test

الإتاحة: https://doi.org/10.5445/IR/1000140364Test
https://doi.org/10.22323/1.378.0029Test
https://publikationen.bibliothek.kit.edu/1000140364Test
https://publikationen.bibliothek.kit.edu/1000140364/134403588Test

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2

تقرير

16O(e,e'p) reaction at large missing energy

المؤلفون: Iodice, M., Cisbani, E., De Leo, R., Frullani, S., Garibaldi, F., Groep, D. L., Hesselink, W. H. A., Jans, E., Lapikas, L., Onderwater, C. J. G., Perrino, R., Ryckebusch, J., Starink, R., Urciuoli, G. M.

المصدر: Phys.Lett.B653:392-397,2007

مصطلحات موضوعية: Nuclear Experiment

الوصف: We investigate the origin of the strength at large missing energies in electron-induced proton knockout reactions. For that purpose the reaction 16O(e,e'p) was studied at a central value omega=210 MeV of the energy transfer, and two values of the momentum transfer: q=300, 400 MeV/c, corresponding to the "dip region". Differential cross sections were determined in a large range of missing energy (Em=0-140 MeV) and proton emission angle (gamma_pq =0-110 deg), and compared to predictions of a model that includes nucleon-nucleon short-range correlations and two-body currents. It is observed that, in the kinematic domain covered by this experiment, the largest contribution to the cross section stems from two-body currents, while short-range correlations contribute a significant fraction
Comment: submitted to Physics Letters B

الوصول الحر: http://arxiv.org/abs/nucl-ex/0703007Test

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3

تقرير

Managing Dynamic User Communities in a Grid of Autonomous Resources

المصدر: ECONF C0303241:TUBT005,2003

مصطلحات موضوعية: Computer Science - Distributed, Parallel, and Cluster Computing, C.2.4, D.4.6

الوصف: One of the fundamental concepts in Grid computing is the creation of Virtual Organizations (VO's): a set of resource consumers and providers that join forces to solve a common problem. Typical examples of Virtual Organizations include collaborations formed around the Large Hadron Collider (LHC) experiments. To date, Grid computing has been applied on a relatively small scale, linking dozens of users to a dozen resources, and management of these VO's was a largely manual operation. With the advance of large collaboration, linking more than 10000 users with a 1000 sites in 150 counties, a comprehensive, automated management system is required. It should be simple enough not to deter users, while at the same time ensuring local site autonomy. The VO Management Service (VOMS), developed by the EU DataGrid and DataTAG projects[1, 2], is a secured system for managing authorization for users and resources in virtual organizations. It extends the existing Grid Security Infrastructure[3] architecture with embedded VO affiliation assertions that can be independently verified by all VO members and resource providers. Within the EU DataGrid project, Grid services for job submission, file- and database access are being equipped with fine- grained authorization systems that take VO membership into account. These also give resource owners the ability to ensure site security and enforce local access policies. This paper will describe the EU DataGrid security architecture, the VO membership service and the local site enforcement mechanisms Local Centre Authorization Service (LCAS), Local Credential Mapping Service(LCMAPS) and the Java Trust and Authorization Manager.
Comment: Talk from the 2003 Computing in High Energy and Nuclear Physics (CHEP03), La Jolla, Ca, USA, March 2003, 7 pages, LaTeX, 5 eps figures. PSN TUBT005

الوصول الحر: http://arxiv.org/abs/cs/0306004Test

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4

تقرير

Investigation of the Exclusive 3He(e,e'pp)n Reaction

المصدر: Phys.Rev.C63:014005,2001

مصطلحات موضوعية: Nuclear Experiment

الوصف: Cross sections for the 3He(e,e'pp)n reaction were measured over a wide range of energy and three- momentum transfer. At a momentum transfer q=375 MeV/c, data were taken at transferred energies omega ranging from 170 to 290 MeV. At omega=220 MeV, measurements were performed at three q values (305, 375, and 445 MeV/c). The results are presented as a function of the neutron momentum in the final-state, as a function of the energy and momentum transfer, and as a function of the relative momentum of the two-proton system. The data at neutron momenta below 100 MeV/c, obtained for two values of the momentum transfer at omega=220 MeV, are well described by the results of continuum-Faddeev calculations. These calculations indicate that the cross section in this domain is dominated by direct two-proton emission induced by a one-body hadronic current. Cross section distributions determined as a function of the relative momentum of the two protons are fairly well reproduced by continuum-Faddeev calculations based on various realistic nucleon-nucleon potential models. At higher neutron momentum and at higher energy transfer, deviations between data and calculations are observed that may be due to contributions of isobar currents.
Comment: 14 pages, 1 table, 17 figures

الوصول الحر: http://arxiv.org/abs/nucl-ex/0008008Test

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5

تقرير

Investigation of the Exclusive 3He(e,e'pp) Reaction

المصدر: Phys.Rev.Lett.83:5443-5446,1999

مصطلحات موضوعية: Nuclear Experiment

الوصف: Cross sections for the 3He(e,e'pp)n reaction were measured at an energy transfer of 220 MeV and three-momentum transfers q of 305, 375, and 445 MeV/c. Results are presented as a function of q and the final-state neutron momentum for slices in specific kinematic variables. At low neutron momenta, comparison of the data to results of continuum Faddeev calculations performed with the Bonn-B nucleon-nucleon potential indicates a dominant role for two-proton knockout induced by a one-body hadronic current.
Comment: 4 pages, 3 figures

الوصول الحر: http://arxiv.org/abs/nucl-ex/9909013Test

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6

تقرير

A Trust Framework for Security Collaboration among Infrastructures - SCI Version 2.0

المؤلفون: Florio, L., Gabriel, S., Quick, R., Raquel, W., Ribaillier, V., Sallé, M., Scicchitano, A., Short, H., Slagell, A., Stevanovic, U., Venekamp, G., Wartel, G., Gagadis, F., Groep, D, Jong, W de, Kaila, U., Kelsey, D., Moens, A., Neilson, I., Niederberger, Ralph

المصدر: Linz, Austria : WISE Community 7 p. (2017).

جغرافية الموضوع: DE

الوصف: The Security for Collaborating Infrastructures working group (SCIv2-WG)is a collaborative activity within the Wise Information Security for e-Infrastructures(WISE) trust community. SCIv2-WG members include information security officersfrom several large-scale distributed Research Infrastructures and e-Infrastructures.The aims of the trust framework defined in this document are to enableinteroperation of collaborating Infrastructures and to manage cross-Infrastructureoperational security risks. It also aims to build trust between Infrastructures bydefining standards for collaboration, especially in cases where specific internalsecurity policy documents cannot be shared.

العلاقة: info:eu-repo/semantics/altIdentifier/hdl/2128/14893; info:eu-repo/grantAgreement/EC//653838; https://juser.fz-juelich.de/record/834625Test; https://juser.fz-juelich.de/search?p=id:%22FZJ-2017-04533%22Test

الإتاحة: https://juser.fz-juelich.de/record/834625Test
https://juser.fz-juelich.de/search?p=id:%22FZJ-2017-04533%22Test

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