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We also present here a model-checking methodology for verifying the security properties of a design expressed in this model. The verification methodology presented here is used to ensure correctness and consistency of a design specification. It is also used to ensure that sensitive security requirements cannot be violated when policy enforcement functions are distributed among the participants. Several aspect-specific verification models are developed to check security properties, such as task-flow constraints, information flow, confidentiality, and assignment of administrative privileges.<\/jats:p>","DOI":"10.1145\/1237500.1237503","type":"journal-article","created":{"date-parts":[[2007,6,6]],"date-time":"2007-06-06T14:37:11Z","timestamp":1181140631000},"page":"7","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":11,"title":["Specification and verification of security requirements in a programming model for decentralized CSCW systems"],"prefix":"10.1145","volume":"10","author":[{"given":"Tanvir","family":"Ahmed","sequence":"first","affiliation":[{"name":"University of Minnesota, Minneapolis Minnesota"}]},{"given":"Anand R.","family":"Tripathi","sequence":"additional","affiliation":[{"name":"University of Minnesota, Minneapolis Minnesota"}]}],"member":"320","published-online":{"date-parts":[[2007,5]]},"reference":[{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1145\/775412.775438"},{"key":"e_1_2_1_3_1","doi-asserted-by":"publisher","DOI":"10.1145\/382912.382913"},{"volume":"1146","volume-title":"Proceedings of the Fourth European Symposium on Research in Computer Security. 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