Multi-authority based weighted attribute encryption scheme in cloud computing

Multi-Authority Attribute-Based Encryption is a promising cryptographic technique for realizing fine-grained access control on the encrypted data in cloud computing. However, existing multi-authority based attribute encryption schemes in cloud computing generally do not take into account the attribute with weight. In this paper, the concept of weight is introduced into multi-authority based attribute encryption scheme. Multi-authority based weighted attribute encryption scheme in cloud computing is proposed. The attribute authorities assign different weights to attributes according to their importance. The analysis shows that the proposed scheme is secure. Since the scheme can reflect the significance of attributes, it is more suitable for the cloud computing environment than the existing schemes.