The Trusted Hierarchical Access Structure-Based Encryption Scheme for Cloud Computing

Cloud computing delivers various resources and services to users over internet. At present many businesses and individual users are adopting cloud services to avail benefits such as, less time, less cost, less management, and maintenance. Still, security is the primary issue that must be tackled and one of the security issues is access control mechanism. The most widely used access control method includes Ciphertext Policy Attribute based Encryption, which is encrypted access control scheme. In order to ensure trustworthy and encrypted access control, a trusted hierarchical access structure based encryption scheme is proposed in this paper. The proposed scheme uses hierarchical access structure to encrypt multiple messages and avoid generation of multiple ciphertexts. The trust evaluation component is also integrated with the proposed access control mechanism. An efficient method to assign trust level for service providers and data users by utilizing their behavioral parameters is proposed in the paper.