Efficient Revocable Multi-Authority Attribute-Based Encryption for Cloud Storage

As is known, attribute-based encryption (ABE) usually adopted for cloud storage, both its achievement of fine-grained access control over data, and guarantee data confidentiality. Nevertheless, single-authority (SA-ABE) has obvious drawback in that only one attribute authority can assign the users' attributes, enabling to be shared within management domain authority, while rendering multiple authorities unable share data. On other hand, multi-authority (MA-ABE) advantages SA-ABE. It not satisfy need confidentiality but also make among different authorities. However, existing MA-ABE schemes are unsuitable devices with resources-constraint, because these all based on expensive bilinear pairing. Moreover, major challenge scheme revocation. So far, many solutions this respect efficient enough. In paper, basis elliptic curves cryptography, we propose an revocable (RMA-ABE) storage. The security analysis indicates proposed satisfies indistinguishable under adaptive chosen plaintext attack assuming hardness decisional Diffie-Hellman problem. Compared schemes, gets it more economical computation