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In heterogeneous sensor networks (HSNs), which use existing key predistribution schemes, network security will significantly decline with time. In this paper, a continuous secure scheme is proposed based on two-dimensional backward key chains. In the scheme, powerful sensors do not need to be equipped with tamper-resistant hardware. Analysis and simulations(More)
For wireless sensor networks, pairwise key establishment is a fundamental security service. However, establishing pairwise keys in wireless sensor networks is not a trivial thing, particularly due to the resource constraints on sensor nodes, and the nodes capture attack. In this paper, we propose a new efficient pairwise key management scheme based on the(More)
A silane containing isocynate groups (3-(trimethoxysilyl) propyl cyanic acid ester, NCO) associated with hexamethyldisilazane (HDMS) is used to modify the surface of poly-(p-phenylene terephthalamide) (PPTA) pulps. As concerns surface chemistry, Attenuated Total Reflection Flourier Transformed Infrared Spectroscopy (ATR FT-IR) and X-ray photoelectron(More)
Key pre-distribution schemes have been proposed as means to overcome wireless sensor network constraints such as limited communication and processing power. Two sensor nodes can establish a secure link with some probability based on the information stored in their memories, though it is not always possible that two sensor nodes may set up a secure link. In(More)
Heterogeneous sensor networks (HSNs) consist of a small number of powerful high-end sensors (H-sensors) and a large number of low-end sensors (L-sensors). HSNs are vulnerable to H-sensors replication attack. In this letter, a scheme against the attack is proposed. The analysis and simulation results indicate that the scheme can improve networks’ resilience(More)
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