This paper focus on multi hop mobility management in WSN ad hoc Network using DVS algorithm for minimum energy consumption. To improve cross layer collaborative in wireless sensor network as well as to improve processing capacity according requirement. In WSN, senor do not only process information at application layer but also synchronize their communication. Using our propose architecture containing two main phases Multihop task mapping and Multihop scheduling using DVS for minimum energy consumption in WSN ad hoc network. Simulation result show significant performance improvement compared with existing mechanism in term of multihope data transfer in NS2.

Wireless Sensor Network has now huge scope for research and application development but sensor networks are vulnerable to different attack. Hence security is key issue while using Sensor networks. Identity deceptions attacks are hard to detect attack. e.g. sinkhole attack, wormhole attack, Sybil attacks. Trust aware routing framework based on trust values of sensor nodes is proved effective for preventing Identity deception attacks. But DOS attacks or link failure conditions are not discussed in existing system. This paper focuses on the study behavior of Trust aware routing framework with backup path generation algorithm for link failure recovery. Link failure happens during packet routing results into packet loss. We have to recover that link failure and avoid packet loss and increasing packet delivery by using recovery phenomena of backup path generation for making routing framework robust.

Wireless Sensor Networks (WSNs) and its applications have shown paradigm changes in the last few years. Since there is a requirement to operate with constrained node resources, limited network resources and the operating in an ad hoc manner, implementing security functionality to protect against adversary nodes becomes a challenging task. In this paper, we present review of the existing methodologies which have been proposed for th implementation trust-aware, location-based routing frameworks which protect the WSN against routing attacks, and also supports large-scale WSNs deployments. The work also analyses as to how efficiently they detect and avoid malicious nodes. This work also discusses in brief the assessment of the implementation cost.

Cloud Computing, being in its infancy in the field of research has attracted lots of research communities in last few years. Lot of investment is made in cloud based research by MNCs like Amazon, IBM and different R & D organizations. Inspite of these the number of stakeholders actually using cloud services is limited. The main hindrance to the wide adoption of cloud Technology is feeling of insecurity regarding storage of data in cloud, absence of reliance and comprehensive access control mechanism. To overcome it, cloud service providers have employed different security mechanism to protect confidentiality and integrity of data in cloud. We have used PAVD security system to protect confidentiality and integrity of data stored in cloud. PAVD is an acronym for Privacy, Authentication and Verification of data. We have statistically analyzed the performance of PAVD security system over different sizes of data files. This paper aimed at comparing the performance of different cloud storage services like Drop box, sky drive etc with our PAVD security system with respect to uploading and downloading time.

An ad hoc network is a collection of nodes that do not rely on a predefined infrastructure to keep the network connected. In this age of science and technology all the technical domains are continuously grown and improved day by day different kinds of communication devices and instruments are becomes common for all human. As the domain of communication is grown need to provide high performance end to end reliable delivery is increases. At the same time security measures is a one of the most issue in communication system. There are various security issues in MANET i.e. Wormhole attack, black hole attack, byzantine attack, information disclosure and resource consumption attack are some more common attacks in MANET. There is various different individual work and methods are developed to overcome these issues. But there are not any kind of common detection and prevention approach is proposed or implemented that are adoptable for MANET. In this project we are propose to design and implement a common framework to detect and prevent black hole and wormhole attack over MANET environment.

Cloud computing is the apt technology for the decade. It allows user to store large amount of data in cloud storage and use as and when required, from any part of the world, via any terminal equipment. Since cloud computing is rest on internet, security issues like privacy, data security, confidentiality, and authentication is encountered. In order to get rid of the same, a variety of encryption algorithms and mechanisms are used. Many researchers choose the best they found and use it in different combination to provide security to the data in cloud. On the similar terms, we have chosen to make use of a combination of authentication technique and key exchange algorithm blended with an encryption algorithm. This combination is referred to as "Three way mechanism" because it ensures all the three protection scheme of authentication, data security and verification, at the same time. In this paper, we have proposed to make use of digital signature and Diffie Hellman key exchange blended with (AES) Advanced Encryption Standard encryption algorithm to protect confidentiality of data stored in cloud. Even if the key in transmission is hacked, the facility of Diffie Hellman key exchange render it useless, since key in transit is of no use without user's private key, which is confined only to the legitimate user. This proposed architecture of three way mechanism makes it tough for hackers to crack the security system, thereby protecting data stored in cloud.

Cloud computing has become new trend, which many enterprises wants to incorporates in their working. Since it relies on sharing of computing resources rather than having local servers or personal devices to handle applications. Cloud computing offers reduced capital expenditure, operational risks, complexity and maintenance, and increased scalability while providing services at different abstraction levels, namely Software-as-a-Service (SaaS), Platform-as-a-Service (PaaS), and Infrastructure-as-a-Service (IaaS)[3] It is used in consumer-oriented applications such as financial portfolios delivering personalized information, or power immersive computer games. The cloud computing however, has not gained wide acceptance. For which the main reason is security issue. Cloud computing is surrounded by many security issues like securing data, data integrity and examining the utilization of data in cloud by the cloud computing vendors This paper is study of various security threats posed to the data stored in cloud and also threats concerned to both user and vendors in cloud computing. This is a literature survey of various key security threats associated with cloud computing. It also includes a critical analysis of various research papers on same grounds. At the same time it discusses various security models and tools proposed in those papers in order to protect data confidentiality and provide security to the data in cloud computing.

In this era of technology all the technical domains are continuously grown and develop. The evidence of this growth is different kinds of communication devices is common for all persons. As the domain of communication is grown need to provide high performance end to end reliable delivery is increases. At the same time security measures is a one of the most issue in communication system. In this project we are study different effects of Black hole attack on MANET over Ad-Hoc on Demand Distance Vector and Optimized Link State Routing protocols. Moreover it we provide the comparative study for which protocol is most of the time effecting with this attack. And finally we provide a common way to detect and prevent the black hole attack over both protocols.

Cloud computing is an amazing technology above all other types of computing. Cloud computing implies sharing of computing resources rather than having local servers or personal individual devices to handle the applications. The goal of cloud computing is to increase the speed of computations per second by applying traditional supercomputing, or high-performance computing power. It is used in consumer-oriented applications such as recruitments, smart staffing and medical image retrieval etc. The cloud computing however, has some problems associated with it .Among them security and privacy are the main concerns. This paper focus on both security and privacy issues of cloud computing. In this paper we have proposed to use Rijndael algorithm for encryption of data on the fly to provide data security in cloud .We have also proposed to make use of digital signature to ensure privacy and authentication of client’s data