Date Added: Jan 2011
Large-scale wireless sensor networks are highly vulnerable to attacks because they consist of numerous resource-constrained devices and communicate via wireless links. As wireless sensor networks are continue to grow, so they need an effective security mechanisms. As sensor networks may interact with sensitive data and/or operate in hostile unattended environments, it is imperative that these security concerns must be addressed from the beginning of the system design. However due to inherent resource and computing constraints, security in sensor networks poses different challenges than traditional network computer security. Here the authors describe an energy efficient security scheme for sensor networks that is designed for long lived networks.