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International Symposium on Autonomous Decentralized Systems (ISADS 2009), 23-25 March 2009, Athens, Greece; 01/2009
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Proceedings of the 67th IEEE Vehicular Technology Conference, VTC Spring 2008, 11-14 May 2008, Singapore; 01/2008
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ABSTRACT: Secure key management in sensor networks is fundamental for data protection. However securing key management process is not a trivial task. Especially key generation and key distribution phases require extreme care. Most cited current research work focuses on finding appropriate methods to securely transmit a key generated by some master node in the insecure wireless sensor network. This work presents a novel approach in which original keys to be used for securing communication are never transmitted across the insecure medium. Instead methods for generating these keys are distributed across the network in such a way that nodes in single cluster are able to generate the same cluster wide key. This approach not only saves energy by minimizing the communication overhead in establishing keys among sensor nodes but also provides high connectivity even when some nodes are in sleep state
Innovations in Information Technology, 2006; 12/2006
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ABSTRACT: Symmetric key cryptography (SKC) based solutions for key management in wireless sensor networks have security shortcomings.
A more secure solution demands the use of public key cryptography (PKC) based key management scheme. This, however, introduces
an increased computation overhead in the tiny devices. An intermediate approach between SKC and PKC may prove beneficial in
terms of both security and efficiency. To investigate the applicability of such a hybrid key management approach, a hierarchical
organization of sensor network is considered and the security and efficiency characteristics of a pure PKC based key management
scheme are compared and evaluated against a semi-PKC based key management scheme. Both theoretical and experimental basis
have been considered in this regard.
01/1970: pages 692-701;
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ABSTRACT: Pervasive computing environments find their practical manifestations through wireless sensor networks, which sense a relationship amongst themselves and the environment. Currently the proposed keying schemes for ensuring security, in wireless sensor networks, may be classified into public and private keying schemes, or their hybrid. However, an investigation in peer work underpins the fact that neither of these works relates the key management schemes with the granularity of key generation, distribution, renewal, and revocation. In this paper, we propose a unified security framework with three key management schemes, SACK, SACK-P, and SACK-H that incorporate symmetric key cryptography, asymmetric key cryptography and the hybrid, respectively. We have evaluated the key management schemes against a broad range of metrics such as energy, resource utilization, scalability and resilience to node compromises. Our evaluation comprises both analytical investigation and experimental validation. The results show that though SACK-P is heavy on resources, it provides maximal security and offers the best resilience to node compromises. On the contrary, SACK is very efficient in terms of storage and communication. Our results substantiate a relationship between the level of security and resource utilization and form a design benchmark for security frameworks.
Computer Communications.
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ABSTRACT: In Dynamic key management systems, while frequent control messaging may be necessary for robustness of security, it is detrimental to energy resources of wireless sensor networks. The problem is further exacerbated for sleep enabled sensor networks as a) malicious nodes penetrate into a network by spoofing the ids of legitimate nodes that are in sleeping state b) it is possible for legitimate sensor nodes to be entirely compromised. In this paper, the abovementioned aspects of keying are addressed as tierce to optimize communication. First a secure key generation mechanism is presented that aims at optimizing communication. Second, a sleep schedule cognizant protocol is presented to prevent id spoofing of sleeping nodes. Third, a post attack mechanism is proposed to prevent the compromised nodes to join the network. Our threesome solution not only saves energy by minimizing the communication overhead in establishing keys among sensor nodes but also provides high but secure connectivity for sleep state nodes.
Network and Parallel Computing Workshops, IFIP International Conference on.
