{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,3]],"date-time":"2026-05-03T10:57:28Z","timestamp":1777805848510,"version":"3.51.4"},"reference-count":0,"publisher":"SAGE Publications","issue":"2-3","license":[{"start":{"date-parts":[[2012,6,12]],"date-time":"2012-06-12T00:00:00Z","timestamp":1339459200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Journal of Computer Security"],"published-print":{"date-parts":[[2012,6,12]]},"abstract":"<jats:p>Ad-hoc collaboration is a newly emerged environment enabling distributed collaborators to share resources. The dynamic nature and unique sharing pattern in ad-hoc collaboration poses great challenges for security services to accommodate both access control and trust management requirements in providing controlled resource sharing. In this paper, we propose a comprehensive, integrated and implemented access management framework, called RAMARS, for secure digital information sharing in ad-hoc collaboration. Our framework incorporates a role-based approach to leverage the originator control, delegation and dissemination control. A trust awareness feature is integrated for dynamic user-role assignment based on user attributes. The access control polices are formally specified, and a peer-to-peer scientific information sharing system \u2013 ShareEnabler \u2013 is presented to demonstrate the feasibility of our approach. The performance evaluation of our prototype system with potential system improvements is also discussed.<\/jats:p>","DOI":"10.3233\/jcs-2012-0446","type":"journal-article","created":{"date-parts":[[2016,5,18]],"date-time":"2016-05-18T03:44:03Z","timestamp":1463543043000},"page":"223-257","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":1,"title":["Policy-driven role-based access management for ad-hoc collaboration"],"prefix":"10.1177","volume":"20","author":[{"given":"Gail-Joon","family":"Ahn","sequence":"first","affiliation":[{"name":"Arizona State University, Tempe, AZ, USA."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jing","family":"Jin","sequence":"additional","affiliation":[{"name":"Deutsche Bank Global Technologies, Frankfurt, Germany."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mohamed","family":"Shehab","sequence":"additional","affiliation":[{"name":"University of North Carolina at Charlotte, Charlotte, NC, USA."}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2012,6,12]]},"container-title":["Journal of Computer Security"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.3233\/JCS-2012-0446","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/journals.sagepub.com\/doi\/pdf\/10.3233\/JCS-2012-0446","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T20:44:32Z","timestamp":1777495472000},"score":1,"resource":{"primary":{"URL":"https:\/\/journals.sagepub.com\/doi\/10.3233\/JCS-2012-0446"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2012,6,12]]},"references-count":0,"journal-issue":{"issue":"2-3","published-print":{"date-parts":[[2012,6,12]]}},"alternative-id":["10.3233\/JCS-2012-0446"],"URL":"https:\/\/doi.org\/10.3233\/jcs-2012-0446","relation":{},"ISSN":["0926-227X","1875-8924"],"issn-type":[{"value":"0926-227X","type":"print"},{"value":"1875-8924","type":"electronic"}],"subject":[],"published":{"date-parts":[[2012,6,12]]}}}