期刊名称：International Journal of Computer Science & Technology
印刷版ISSN：2229-4333
电子版ISSN：0976-8491
出版年度：2014
卷号：5
期号：3
页码：183-186
语种：English
出版社：Ayushmaan Technologies
摘要：Several security schemes for data sharing on un trusted servers have been proposed. In these approaches, data owners store the encrypted data files in un trusted storage and distribute the corresponding decryption keys only to authorized users. Thus, unauthorized users as well as storage servers cannot learn the content of the data files because they have no knowledge of the decryption keys. However, the complexities of user participation and revocation in these schemes are linearly increasing with the number of data owners and the number of revoked users, respectively. By setting a group with a single attribute, Lu et al. Proposed a secure provenance scheme based on the cipher text policy attribute-based encryption technique, which allows any member in a group to share data with others. In this paper, we propose a novel Mona protocol for secure data sharing in cloud computing. Our proposed scheme is able to support dynamic groups efficiently. Specifically, new granted users can directly decrypt data files uploaded before their participation without contacting with data owners.
