Summary The widely deployed wireless sensor networks, incorporated with the capabilities of sensing, processing, and communicating, require more effective routing to maintain the balance between the performance parameters and to be prevented from the security attacks. The cryptographic methods used were effective but consumed more energy on the authentication, the encryption, and the decryption. So the routing addressing the security problems, with the reduced energy consumption, latency, and PDR losses, maximizing the network lifetime is proposed in the paper. This multiobjective routing problem of the sensor networks is handled using the ant colony routing techniques, taking into consideration the remaining energy of the nodes, the distance between the nodes, and the trust credentials of the nodes, to reduce the energy consumption and enhance the lifetime of the sensor networks. The further performance evaluation using the network simulator‐2 reveals the efficiency and the quality of the service of proposed routing technique over existing techniques on the grounds of energy utilization, PDR, lifetime of sensor networks, and the security enhancement rate.

The wireless sensor networks are employed in a variety of fields such as military, health care, industry etc. Due to the increasing acceptance of this technology leads us to consider more about the security aspects of the WSNs. To ensure the integrity and to protect data from unauthorised accesses some method of cryptographic technologies must be employed. The symmetric and asymmetric encryption techniques can be employed in the WSN architecture to provide security. The asymmetric key encryption techniques may provide a higher level of security but compared to the symmetric key encryption it causes more overheads to the sensor nodes. Another method of location based encryption which can be used along with these technologies provides an extra layer of security by restricting the cipher text to be decrypted only at a specified location. A review of all these systems is described in this paper.

No abstract

Mobile adhoc network (MANET)is a type of wireless network. It is a open network environment, in other words it is a infrastructreless network. So any node can join and leave in the network freely. Security is the primary concern in the wireless medium. Major functionality of MANET is protecting the data bits which transfer from one node to another node. Because of its dynamic nature MANET is not much secure than wired network. To overcome this problem, cluster based certificate revocation with vindication capability is proposed. In this paper we present the cluster based architecture is used to construct the topology and provide better security for data transfer in MANET Index Terms-MANT, certificate , revocation, open network

No abstract