期刊名称：International Journal of Computer Science and Information Technologies
电子版ISSN：0975-9646
出版年度：2015
卷号：6
期号：1
页码：594-596
出版社：TechScience Publications
摘要：We suggest a decentralized and distributed access control mechanism which will generate and distribute keys to access data shared in public cloud with anonymous authentication with complex but efficient encryption and decryption of data on each access. As data needs to be transferred to and from the cloud on each access, AES and DES encryption scheme will not be used by our system which requires multiple passes to encrypt the data as it is inefficient for real time data transfer that why we use modified reverse circle cypher which exploits benefits of confusion and diffusion. The proposed idea is for public cloud which has multiple tenants which should be efficient in handling aggregate cryptosystem in cloud and should provide fast and efficient access to the shared data and eliminating cloud concerns like data loss or central server loss, data access, privacy and security from untrusted tenants/granter/hackers. Unique key generation, distribution for each transaction and allowed user should be able to access & modify the file based on the given hierarchy.
