In this paper, we propose SeGrid, a secure grid infrastructure for large scale sensor networks. The basic idea relies on the availability of a low-cost public cryptsystem (e.g. Blom’s key management scheme [4]) that can be used for shared key computation between the source and the destination, as long as the public shares are known to each other. In SeGrid, each sensor resides in a grid compute...

Ad hoc Sensor Networks (ASNs) are ad-hoc mobile networks that consist of sensor nodes with limited computation and communication capabilities. Because ASNs may be deployed in hostile areas, where communication is monitored and nodes are subject to be captured by an adversary, ASNs need a cryptographic protection of communications and sensor-capture detection. According to that the ASN is deploy...

Sensor networks are ad-hoc mobile networks that include sensor nodes with limited computational and communication capabilities. They have become an economically viable monitoring solution for a wide variety of applications. Obviously, it is important to ensure security and, taking into account limited resources available in wireless sensor networks, the use of symmetric cryptography is strongly...

The heterogeneity and relative limited resources of the nodes deployed in hierarchical wireless sensor network (WSN) impose a new strategy to guarantee security and confidentiality. A deployment strategy is proposed and focuses on two different levels: complexity of the scheme and security requirement for the application. Three different cryptography mechanisms may be concurrently used in the s...

Key management play a central role for protecting communication in WSNs. Due to the limited memory resources and energy constraints, complex security algorithms cannot be used in sensor networks. Therefore, to secure data communication and well balance between the security level and the associated energy consumption is a challenging task. In this paper, we present an Improved Key management Sch...

Wireless sensor networks are a challenging field of research when it comes to security issues. Using low cost sensor nodes with limited resources makes it difficult for cryptographic algorithms to function without impacting energy consumption and latency. In this paper, we focus on key management issues in multi-hop wireless sensor networks. These networks are easy to attack due to the open nat...

Many cryptographic algorithms (e.g., AES, HMAC) require the establishment of shared keying material in advance. The Federal key agreement schemes document is based on ANSI X9.42 agreement of symmetric keys using discrete logarithm cryptography, ANSI X9.44 key agreement and key transport using factoringbased cryptography and ANSI X9.63 key agreement and key transport using elliptic curve cryptog...

The threshold secret sharing technique has been used extensively in cryptography. This technique is used for splitting secrets into shares and distributing the shares in the network to provide protection against attacks and to reduce the possibility of loss of information. In this paper, a new approach is introduced to enhance communication security among the nodes in a network based on the thr...

An essential requirement for providing secure services in wireless sensor networks is the ability to establish pairwise keys among sensors. Due to resource constraints on the sensors, the key establishment scheme should not create significant overhead. To date, several key establishment schemes have been proposed. Some of these have appropriate connectivity and resistance against key exposure, ...

Security is a critical and vital task in wireless sensor networks (WSNs), therefore different key management systems have been proposed, many of which are based on symmetric cryptography. Such systems are very energy efficient, but they lack some other desirable characteristics. On the other hand, systems based on public key cryptography (PKC) have those desirable characteristics, but they cons...