Attribute-Based Certificateless Cryptographic System
Guoyan Zhang · Journal of Computers · 2014
As an extension of identity-based encryption scheme, attribute-based encryption scheme also has the key escrow problem. Multi-authority attribute-based encryption schemes are principal solution, but it is at the cost of the introducing extra infrastructure and communication. This paper introduces the concept of attribute-based certificatless encryption system (ABCE), which is a new approach to mitigate the key escrow problem in attribute-based encryption scheme. In ABCE, the user can choose his own secret key that the KGC cannot obtain. In contrast to attribute-based encryption scheme under multiple authorities, our approach needs less extra cost. Following, we give a generic construction and an improvement in the efficiency.