%0 Journal Article %A Wang, Changji %A Yuan, Yuan %D 2020 %J Computers, Materials \& Continua %@ 1546-2226 %V 63 %N 2 %P 1031--1041 %T An Efficient Ciphertext-Policy Attribute-Based Encryption Scheme with Policy Update %M doi:10.32604/cmc.2020.06278 %U http://www.techscience.com/cmc/v63n2/38558