MultiPol: Towards a Multi-policy Authorization Framework for RESTful Interfaces in the Cloud - Luo, Yang; Tian Puyang; Wu Luo; Qingni Shen; Anbang Ruan; Wu, Zhonghai (Information and Communications Security - 18th International Conference, ICICS 2016, Singapore, November 29 - December 2, 2016, Proceedings, 2016)