TY - JOUR AU - Xu An Wang AU - Xiaoyuan Yang AU - Cong Li AU - Yudong Liu AU - Yong Ding TI - Improved Functional Proxy Re-encryption Schemes for Secure Cloud Data Sharing JO - Computer Science and Information Systems PY - 2018 VL - 15 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CSIS_2018_15_3_a9/ ID - CSIS_2018_15_3_a9 ER -