International Journal of Computer Networks and Applications

70-77

Authors: A.Nithya, B. Ramakrishnan, Resul Das

Cloud computing is the mass storage area that helps the user to access the data anywhere. There are so many platforms provided by the cloud service provider. They are SaaS (Software as a Service), PaaS (Platform as a Service) and IaaS (Infrastructure as a Service) etc. Though security is not fully provided by the cloud service provider to reshape the advances in information technology, cloud computing is expected as an updated technology. The data was securely stored in the cloud and if it is corrupted then the proxy is implemented to regenerate the corrupted data in the cloud. Thus security and integrity is successfully achieved. This is further extended by implementing efficient file fetching by the third party user. To maintain efficient file fetching system Multi authority cloud model is proposed. The model is continuing with the proposed entities such as Attribute authority (AA), Certificate Authority (CA) and Third party end user. The data is encrypted by the owner and stored in the cloud server. CA is used to delegate the Secret Key (SK) to AA and Public Kay (PK) to user. After Checking the authentication of the owner CA provides PK to the owner only then the owner is allowed to upload the data in cloud, the data is encrypted and outsource to the cloud server. Using SK the third party user is allowed to view the data from the cloud. If the user enter the wrong key or misuse the data, user will be revoked. If the User needs to download or update or delete the data in the cloud the user need to send a Data Access Privilege (DAP) request to the respective owner. Certificate authority is responsible to generate a key to the entities such as User, Data Owner and attributes.

86-94

Authors: M. Kavitha, B. Ramakrishnan, Resul Das

Packet loss is a major issue in Wireless Sensor Network (WSN) data transmission which is caused by malicious packet dropping and link error. In conventional methods, the malicious dropping may result in a packet loss rate that is comparable to normal channel losses, the stochastic processes that characterizes the two phenomena exhibited in different correlation which would affect the network performance i.e. detection accuracy. By detecting the correlations between lost packets, we will decide whether the packet loss is purely due to regular link errors, or is a combined effect of link error and malicious drop. In order to overcome these issues, we have proposed a HLA (Homomorphic Linear Authentication) based on routing protocol which is a collusion proof mechanism and resolves the public auditing problem. Here, the proposed technique will be implemented in OLSR (Optimized Link State Routing) Protocol. The actual status of each packet transmission i.e., the packet loss information can be described by our technique. The network simulation results describe the performance of the proposed method in terms of detection accuracy in low computation complexity. Our HLA based OLSR protocol is compared with existing AODV, RIP and other protocols.