Encryption and key distribution are important primitives to build secure Wireless Sensor Networks (WSN). Different block ciphers were proposed in literature to provide encryption in resource constraint distributed networks. A large amount of different key distribution schemes were implemented, targeting different types of WSNs. These schemes face issues with respect to their requirements, imple...

Instant Messaging (IM) is a type of communications service over the Internet that enables individuals to exchange text messages and track availability of a list of users in real-time. The existing instant messaging technology does not provide built-in support for security feature as proposed idea. And also in Battle Field Management System the most commonly used as means of communication is Wal...

Present research on wireless sensor networks has focused on routing and security independently. In this paper, we present a Secure, Cluster-based, Energy Aware Routing (SCEAR) scheme that provides both a hierarchal energy aware routing and a secure environment for communication. In our approach, the network is divided into clusters with a cluster-head that aggregates the information and securel...

Encryption and key distribution are important primitives to build secure Wireless Sensor Networks (WSN). Different block ciphers were proposed in literature to provide encryption in resource constraint distributed networks. A large amount of different key distribution schemes were implemented, targeting different types of WSNs. These schemes face issues with respect to their requirements, imple...

MANET(Moving Ad hoc Network) is a convenient infrastructure-less communication network which is commonly susceptible to various attacks. Many key management schemes for MANETs are presented to solve various security problems. Identity (ID)-based cryptography with threshold secret sharing ,ECC and Bilinear Pairing computation is a popular approach for the key management design. In this article, ...

In this paper we consider two security notions related to Identity Based Encryption: Key-insulated public key encryption, introduced by Dodis, Katz, Xu and Yung; and Timed-Release Public Key cryptography, introduced independently by May and Rivest, Shamir and Wagner. We first formalize the notion of secure timed-release cryptography, and show that, despite several differences in its formulation...

We investigate a number of issues related to the use of multiple trust authorities and multiple identities in the type of identifier based cryptography enabled by the Weil and Tate pairings. An example of such a system is the Boneh and Franklin encryption scheme. We present various applications of multiple trust authorities. In particular we focus on how one can equate a trust authority with a ...

A threat model for sensor networks and mobile ad hoc networks (MANETs) is introduced. Components that can be used to form an adversary model are developed. Threat categories, modes of use, and a variety of threats to system assets are identified, including threats to communications, infrastructure services, individual nodes and human users. Example envisaged applications of the threat model are...

In these years, the design of certificateless signature (CLS) scheme without bilinear pairings has been thoroughly investigated owing to its effectiveness on solving the key escrow problem in identity-based cryptography. In this paper, we identify that Wang et al.’s certificateless signature scheme cannot fulfil its security claims. We present a series of attack processes to demonstrate that Wa...