Alter-egos and Roles: Supporting Workflow Security in Cyberspaces.

Ehud Gudes Reind P. van de Riet J. F. M. Burg Martin S. Olivier Alter-egos and Roles: Supporting Workflow Security in Cyberspaces. 182-195 1997 conf/dbsec/1997 DBSec db/conf/dbsec/dbsec97.html#GudesRBO97