A New Convertible Authenticated Encryption Scheme Based on Bilinear Square Diffie-Hellman Problem
Proceedings of 2016 the 6th International Workshop on Computer Science and Engineering · 2016
Convertible authenticated encryption (CAE) scheme is a cryptographic scheme which has been found numerous practical applications like on-line credit card transactions, confidential contract signing and the protection of digital evidence, etc.In this paper, we propose a new CAE scheme based on the bilinear square Diffie-Hellman problem.The proposed scheme is proved secure against adaptive chosen-plaintext attacks (CPA2) and adaptive chosen-message attacks (CMA) in the random oracle mode.Compared with previous schemes, ours not only provides better functionalities, but also has provable security.