Secure Distibuted data discovery & dissemination IN WSN
- 1. Secure and Distributed Data Discovery and Dissemination in Wireless Sensor Networks ABSTRACT: A data discovery and dissemination protocol for wireless sensor networks (WSNs) is responsible for updating configuration parameters of, and distributing management commands to, the sensor nodes. All existing data discovery and dissemination protocols suffer from two drawbacks. First, they are based on the centralized approach; only the base station can distribute data items. Such an approach is not suitable for emergent multi-owner-multi-user WSNs. Second, those protocols were not designed with security in mind and hence adversaries can easily launch attacks to harm the network. This paper proposes the first secure and distributed data discovery and dissemination protocol named DiDrip. It allows the network owners to authorize multiple network users with different privileges to simultaneously and directly disseminate data items to the sensor nodes. Moreover, as demonstrated by our theoretical analysis, it addresses a number of possible security vulnerabilities that we have identified. Extensive security analysis show DiDrip is provably secure. We also implement DiDrip in an experimental network of resource-limited sensor nodes to show its high efficiency in practice. EXISTING SYSTEM: • More importantly, all existing data discovery and dissemination protocols employ the centralized approach, data items can only be disseminated by the base station.
- 2. • Unfortunately, this approach suffers from the single point of failure as dissemination is impossible when the base station is not functioning or when the connection between the base station and a node is broken. • In addition, the centralized approach is inefficient, non-scalable, and vulnerable to security attacks that can be launched anywhere along the communication path. DISADVANTAGES OF EXISTING SYSTEM: • Centralized approach • Existing method is in-efficient • Vulnerable to security attacks PROPOSED SYSTEM: • In this project, we propose secure and data discovery and dissemination protocol (DiDrip). DiDrip consists of four phases, system initialization, user joining, and packet preprocessing and packet verification. • For our basic protocol, in system initialization phase, the network owner creates its public and private keys, and then loads the public parameters on each node before the network deployment. • In the user joining phase, a user gets the dissemination privilege through registering to the network owner.
- 3. • In packet preprocessing phase, if a user enters the network and wants to disseminate some data items, he/she will need to construct the data dissemination packets and then send them to the nodes. • In the packet verification phase, a node verifies each received packet. If the result is positive, it updates the data according to the received packet. ADVANTAGES OF PROPOSED SYSTEM: • User can send the data directly to the sensor nodes without using the base station • Provide more security for data • Increase packet delivery ratio SYSTEM ARCHITECTURE:
- 4. BLOCK DIAGRAM: SOFTWARE REQUIREMENTS: Operating system : Windows XP/7/LINUX. Implementation : NS2 NS2 Version : NS2.2.28 Front End : OTCL (Object Oriented Tool Command Language) Tool : Cygwin (To simulate in Windows OS)