Proxy Re-Encryption Based Multi-Factor Access Control for Ciphertext in Cloud
SU Mang (苏铓), WANG Liangchen (汪良辰), FU Anmin (付安民), YU Yan (俞研)
Journal of Shanghai Jiao Tong University (Science) . 2018, (5): 666 -670 .  DOI: 10.1007/s12204-018-1962-5