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http://dx.doi.org/10.3745/KIPSTC.2006.13C.5.541

Key Update Protocols in Hierarchical Sensor Networks  

Lee, Joo-Young (이화여자대학교 컴퓨터학과)
Park, So-Young (이화여자대학교 컴퓨터학과)
Lee, Sang-Ho (이화여자대학교 컴퓨터학과)
Publication Information
The KIPS Transactions:PartC / v.13C, no.5, 2006 , pp. 541-548 More about this Journal
Abstract
Sensor network is a network for realizing the ubiquitous computing circumstances, which aggregates data by means of observation or detection deployed at the inaccessible places with the capacities of sensing and communication. To realize this circumstance, data which sensor nodes gathered from sensor networks are delivered to users, in which it is required to encrypt the data for the guarantee of secure communications. Therefore, it is needed to design key management scheme for encoding appropriate to the sensor nodes which feature continual data transfer, limited capacity of computation and storage and battery usage. We propose a key management scheme which is appropriate to sensor networks organizing hierarchical architecture. Because sensor nodes send data to their parent node, we can reduce routing energy. We assume that sensor nodes have different security levels by their levels in hierarchy. Our key management scheme provides different key establishment protocols according to the security levels of the sensor nodes. We reduce the number of sensor nodes which share the same key for encryption so that we reduce the damage by key exposure. Also, we propose key update protocols which take different terms for each level to update established keys efficiently for secure data encoding.
Keywords
Sensor Network; Security; Hierarchical; Key Update;
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