During the last few years, a vehicular ad hoc network (VANETs)

The wireless arena has been experiencing exponential growth in nowadays. Wireless devices are now playing an everincreasingly important role in our lives. an ad hoc network might consist of several home-computing devices, including notebooks, handheld PCs, and so on. Each node will be able to communicate directly with other nodes that reside within range of transmission. For communicating with nodes that reside besides this range, the node needs to use intermediate nodes to relay messages hop by hop. Gray hole is a node that can switch from behaving correctly to behaving like a black hole that is it is actually an attacker and it will act as a normal node. So we can't identify easily the attacker since it behaves as a normal node. Every node maintains a routing table that stores the next hop node information which is a route packet to destination node In this paper we proposed an innovative approach for the detection of the dangerous grayhole attack. The proposed algorithm is implemented on a very popular on demand routing protocol known as AODV (Ad hoc On demand Distance Vector) routing protocol. The beauty of this proposed algorithm is that it not only identifies the grayhole attacker node but also confirm it as well. The algorithm is divided into two phases: Noting Phase and the Confirmation phase. To simulate the effect of the proposed work the popular NS 2(Network Simulator 2) is used.

This is an era of technology; we are surrounded with the technology. Now a day’s people become smarter they want to operate each and everything’s with his smart phone/laptop/pc without going anywhere, it happens due to IOT devices. That’s why in this paper we have design a smart home with enhance security. In smart home we can operate the household things(fan, light, ac, any applications, door, windows, etc. )with the mobile. We design a IOT based smart and secure home model in latest released cisco packet tracer. Cisco packet is basically a simulator to teach the student about the network. But in newly released cisco packet tracer 7.2.1 it have more sensors, board, Programming languages, IOE devices. In this we can design, test, see the actual working of the network/model in real time. In testing the IoT home network wireless network gateway system, multiple electronic devices can be controlled and monitored via smartphone based on predefined configuration conditions. The smart and secure home is implemented using different types of IOE devices with enhanced security, house environment prospective and safety.

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