Authors : K. Vidya, V.S. Alamelu, K. Sashi Kumar and L. Sree Chandraa
Abstract: Security is one of the leading concerns in the distributed system because integration of different components leads to new security issues. Handling the threats and vulnerabilities in the distributed environment is important. The biggest concerns of storing the data in a distributed environment like cloud include reliability, security, privacy preservation of the user. The attribute based encryption techniques enforce strict access permission to the files stored in cloud. There are multiple key distributing authorities because it is not possible for a single authority to distribute keys to all the users of the cloud. The decentralised approach also tackles the problem of single point of failure. Privacy of the users can also be preserved using the attribute based techniques where authentication of the users is done by using the attributes instead of their unique user identities. The existing classical cryptographic system suffers from various attacks where the cloud can tamper the data or an interceptor may sniff the keys. Almost, all the encryption techniques are prone to attacks and hence, an additional layer of security is provided to the classical cryptographic system by using the quantum cryptographic techniques. This makes the entire system resilient towards man-in-the-middle attack, user revocation attack and preserves the data from being tampered by the cloud. The quantum cryptographic techniques increase the time and the heap space occupied during encryption and decryption by an insignificant amount but improves the security vastly by tackling various attacks. The proposed system enhances the security of the existing system while there is an insignificant difference in the performance of the two systems.
K. Vidya, V.S. Alamelu, K. Sashi Kumar and L. Sree Chandraa, 2016. Quantum Cryptographic Approach to Decentralized Access Control and Privacy Preserving in Cloud. Asian Journal of Information Technology, 15: 578-592.