Deja Q Encore RIBE: Anonymous Revocable Identity-Based Encryption with Short Parameters
Qianqian Xing, Baosheng Wang, Xiaofeng Wang, Yong Tang, Yi Wang · 2017
Revocable Identity-Based Encryption (RIBE) allows feasible key revoke to enable dynamic user management in certificateless system. The existing RIBE schemes fail to keep receivers anonymity, or short parameters, or adaptive security. Hence, we overcome the drawbacks of previous schemes and contribute to an Anonymous RIBE (ARIBE) scheme with two advantages: (1) the provable full security under the adaptive-ID attack in the standard model and (2) the sufficient efficiency in optimal parameters-the secret subkey and the update subkey are one group element each and decryption only requires two pairings. To our best knowledge, our construction is the first IBE scheme that simultaneously achieves efficient revocability, anonymity and full security in the exponent-inversion IBE family.