Der Entwurf strukturierter rollenbasierter Zugriffskontrollmodelle     

Steffen E. Seufert 《Informatik - Forschung und Entwicklung》2002,17(1):1-11

Zusammenfassung. In diesem Beitrag wird ein formaler Ansatz zur Ableitung von Zugriffsrechten auf der Basis eines formalen Organisationsmodells vorgestellt. Hierzu wird der Ansatz der rollenbasierten Zugriffskontrolle (engl. Role-Based Access Control, kurz RBAC) um die M?glichkeit erweitert, Aufbauorganisationen zu modellieren. Der Vorteil gegenüber rollenbasierten Ans?tzen mit einfachen Rollenhierarchien ist die klare Struktur, die einem Zugriffskontrollmodell durch die Organisationsform aufgepr?gt wird. Des Weiteren k?nnen organisatorische Regelungen, wie z.B. Urlaubsvertretung oder Weisungsbefugnis, direkt im Modell hinterlegt werden. Aufwendig zu pflegende und h?ufig inkonsistente Rollenkataloge werden obsolet. Sicherheitsstrategien mit unpr?zisen Vorgaben lassen sich mittels der vorgestellten Technik der sog. `Kompetenzerweiterung' umsetzen. Das zugrundeliegende Paradigma des vorgestellten Ansatzes unterscheidet sich stark von anderen Ans?tzen mit statischer Autorisation. Nutzer k?nnen sich Zugriffsrechte in fest definierten Grenzen selbstverantwortlich zuteilen, wobei jedoch eine nachtr?gliche Kontrolle stark vereinfacht und damit praktikabel wird. Eingegangen am 22. Februar 2001 / Angenommen am 22. Mai 2001  相似文献   

Book Review     

Louise Gagnon-Arguin  Carol Couture  Agnes E. M. Jonker  Fernanda Ribeiro 《Archival Science》2001,1(1):107-116

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The coming of age of information technology     

Taube M 《Bulletin of the Medical Library Association》1989,77(3):268

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The coming of age of information technology     

Taube M 《Bulletin of the Medical Library Association》1989,77(4):371

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Educational videotape: a medium full of promise and riddled with pitfalls     

DAVID WILL  ROBERT M. WRATE 《Health information and libraries journal》1988,5(4):234-236

Quality assurance in Canadian hospital libraries—the challenge of the eighties     

KATHLEEN M. EAGLETON 《Health information and libraries journal》1988,5(3):145-159

ADONIS—latest developments and its role in the changing publisher/library relationship     

HENK C. J. COMPIER  ROBERT M. CAMPBELL  B. V. ADONIS 《Health information and libraries journal》1992,9(1):3-13

The role of sports as a social status determinant for children.     

M A Chase  G M Dummer 《Research quarterly for exercise and sport》1992,63(4):418-424

This study was designed to examine children's attitudes toward the role of sports in determining social status, as well as the activities in which children prefer to participate. A total of 227 boys and 251 girls in Grades 4, 5, and 6 completed a questionnaire to determine which criteria were most important in determining personal, female, and male popularity. Personal popularity was answered by the girls and boys according to "what would make you well liked by your classmates." Female and male popularity was determined by asking both girls and boys to decide "what would make (girls, for female subjects, and boys, for male subjects) well liked by your classmates." A comparison of results from the Buchanan, Blankenbaker, and Cotten (1976) investigation and the present study indicated that, in the last 15 years, appearance has become more important and academic achievement less important in determining personal popularity for girls. For boys, the comparison revealed that sports have become more important and academic achievement less important in determining personal popularity. Boys reported sports to be the most important determinant of personal and male popularity and appearance as the most important determinant of female popularity. Sports and appearance became more important for boys with each higher grade level. Girls reported appearance to be the most important determinant of personal, male, and female popularity. For girls, appearance became more important with each higher grade level. A comparison of results from the Buchanan et al. (1976) and the present study indicated that the activities in which girls and boys preferred to participate have changed.(ABSTRACT TRUNCATED AT 250 WORDS)  相似文献   

The universities, scientific research and the national interest in Latin America     

Vessuri HM 《Minerva》1986,24(1):1-38

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State Data Centers: improving access to census information     

Redmond M 《Government Information Quarterly》1986,3(3):291-303

"The U.S. Bureau of the Census created the State Data Center program in 1978 to improve public access to census information. This article discusses the background, structure, and services of that program; the role of libraries in the program; and future directions in State Data Center/library relationships. The appendix lists contact person names, as well as addresses and telephone numbers for State Data Center lead agencies."  相似文献