Wang, H.Yong, J.Li, J.Peng, M.Shen, S.Weiming, W.2025-12-172025-12-172008Proceedings of the 12th international conference on computer supported cooperative work in design, 2008 / Shen, S., Weiming, W. (ed./s), vol.1, pp.277-2829781424416509https://hdl.handle.net/1959.8/65552Role-based access control (RBAC) has been proven to be a flexible and useful access control model for information sharing in distributed collaborative environments. Permission-role assignments (PRA) is one important process in the access model. However, problems may arise during the procedures of PRA. Conflicting permissions may assign to one role, and as a result, the role with the permissions can derive unexpected access capabilities. This paper aims to analyze the problems during the procedures of permission-role assignments in distributed collaborative environments and to develop authorization allocation algorithms to address the problems within permission-role assignments. The algorithms are extended to the case of PRA with the mobility of permission-role relationship. Finally, comparisons with other related work are discussed to demonstrate the effective work of the paper. © 2008 IEEE.enCopyright 2008 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.authorizationPRARBACConference paper10.1109/CSCWD.2008.4536994