Dependable and Robust Attribute-Based Encryption in Mobile Cloud Computing

Abstract

Security and privacy are very important challenges for outsourced private data over cloud storages. By taking Attribute-Based Encryption (ABE) for Access Control (AC) purpose we use fine-grained AC over cloud storage. In this paper we extend previous Ciphertext Policy ABE (CP-ABE) schemes especially for mobile and resource constrained devices in cloud computing environment. To wide-spread adoptions of ABE for resource-constrained device, very light-weight authentication mechanism is required to authentication ciphertext before starting cost expensive ABE techniques to thwart Denial-of-Service (DoS) attacks which are used to power depletion and network downing purposes by attackers. We introduce and address the problem to more dependability and robustness of whole networks when DoS attacks are present. Finally with discussion on different aspects of the proposal we show its profitability.