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Effective use of the resources in modern collaborative environment suggests their sharing between collaborating organisations and user groups and on-demand provisioning for the specific tasks and projects that may involve distributed resources and users from different administrative and security domains. The proposed in earlier authors' work the general Complex Resource Provisioning (CRP) model provides a basis for developing the AuthoriZation (AuthZ) infrastructure for on-demand multi-domain resource provisioning. This paper discusses such important issues as managing authorisation session and security context in multi-domain CRP and security mechanisms used for this.
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