A Lightweight ABE Security Protection Scheme in Cloud Environment Based on Attribute Weight

Attribute-based encryption (ABE) is a technique used to encrypt data, it has the flexibility of access control, high security, and resistance collusion attacks, especially in cloud security protection. However, large number bilinear mappings are ABE, calculation pairing time-consuming. So there problem low efficiency. On other hand, decryption key not uniquely associated with personal identification information, if maliciously sold, ABE unable achieve accountability for user. In practical applications, shared message requires hierarchical sharing most cases, this paper, we present hierarchy scheme scenario. Firstly, attributes were grouped weighted according importance attributes, then an structure based on threshold tree was constructed attribute weight. This method saved computing time while ensuring on-demand information users. addition, help power cloud, two-step complete access, which relieved storage burden client side. Finally, simulated tested CP-ABE, selected different levels test its performance. The proof experimental simulation result show that proposed efficiency good performance, solution implements message.