Securing Organization’s Data: A Role-Based Authorized Keyword Search Scheme With Efficient Decryption

For better data availability and accessibility while ensuring secrecy, organizations often tend to outsource their encrypted the cloud storage servers, thus bringing challenge of keyword search over data. In this article, we propose a novel authorized scheme using Role-Based Encryption (RBE) technique in environment. The contributions article are multi-fold. First, it presents which enables only users, having properly assigned roles, delegate keyword-based capabilities providers without disclosing any sensitive information. Second, supports multi-organization environment, where users can be associated with more than one organization. Third, proposed provides efficient decryption, conjunctive revocation mechanisms. Fourth, outsources expensive cryptographic operations decryption secure manner. Fifth, have provided formal security analysis prove that is semantically against Chosen Plaintext Keyword Attacks. Finally, our performance shows suitable for practical applications.