No abstract

No abstract

The malicious insider can be an employees, user and/or third party business partner. In cloud environment, clients may store sensitive data about their organization in cloud data centers. The cloud service provider should ensure integrity, security, access control and confidentiality about the stored data at cloud data centers. The malicious insiders can perform stealing on sensitive data at cloud storage and at organizations. Most of the organizations ignoring the insider attack because it is harder to detect and mitigate. This is a major emerging problem at the cloud data centers as well as in organizations. In this paper, we proposed a method that ensures security, integrity, access control and confidentiality on sensitive data of cloud clients by employing multi cloud service providers. The organization should encrypt the sensitive data with their security policy and procedures and store the encrypted data in trusted cloud. The keys which are used during encryption process are again encrypted and stored in another cloud area. So that organization contains only keys for keys of encrypted data. The Administrator of organization also does not know what data kept in cloud area and if he accesses the data, easily caught during the auditing. Hence, the only authorized used can access the data and use it and we can mitigate insider attacks by providing restricted privileges.

networks as they waste a large portion of the network capacity. With the introduction of directional antennas in to the On the other hand, smart antenna technology may have wireless ad hoc networks, there has been an intense work various potentials. In particular, it can improve spatial reuse done on proposing a specialized MAC protocol that exploits of the wireless channel, which allows nodes to communicate the advantages of the directional antennas. Some protocols simultaneously without interference. Furthermore, the proposed extensions to the Distributed coordination Function directional transmission concentrates signal power to the (DCF) using directional antennas while other protocols receiver, which enlarges the transmission range. Thus it can proposed new MAC methods exploiting the directional potentially establish links between nodes far away from each transmission capability of Directional antennas. MAC other, and it prevents network partitions and the number of protocols proposed have exposed some new problems like routing hops can be fewer than that of Omni-directional

No abstract