An Attribute-Based Encryption Scheme in Cloud Computing for Efficient File Hierarchy

Abstract

Ciphertext-policy characteristic-primarily based encryption (CP-ABE) has been a favoured encryption generation to solve the tough hassle of comfy records sharing in cloud computing. The shared records documents generally have the feature of multilevel hierarchy, especially within the location of healthcare and the military. But, the hierarchy structure of shared files has not been explored in CP-ABE. In this paper, an green file hierarchy characteristic-primarily based encryption scheme is proposed in cloud computing. The layered get entry to systems are incorporated into an unmarried get right of entry to structure, and then, the hierarchical files are encrypted with the included get admission to shape. The ciphertext additives associated with attributes may be shared by means of the files. Consequently, each ciphertext garage and time price of encryption are saved. Moreover, the proposed scheme is proved to be relaxed underneath the usual assumption. Experimental simulation shows that the proposed scheme is highly green in phrases of encryption and decryption. With the quantity of the documents increasing, the blessings of our scheme grow to be increasingly more conspicuous.