EasiSec: a SoC security coprocessor based on fingerprint-based key management for WSN Online publication date: Sun, 05-May-2013
by Yi Wang; Hailong Shi; Li Cui
International Journal of Sensor Networks (IJSNET), Vol. 13, No. 2, 2013
Abstract: The practical applications of Wireless Sensor Networks (WSNs) in vulnerable areas require the communication data possessing confidentiality, integrity and freshness. In this paper, we present the implementation and simulation of a hardware security coprocessor called EasiSec based on system-on-chip (SoC) technology for WSN. Compared with existing works, our unique features include: (1) A fingerprint-based key management (FKM) module to extract key elements from program memory and build secret keys for cryptographic coprocessor, which can resist the key compromise impersonation attack; (2) A reusable optimised logic cell (ROLC) to complete encryption and decryption, and minimise the hardware overhead; (3) An authentication module based on Linear Feedback Shift Register (LFSR) to provide two-party data with integrity and freshness. The design is mapped on FPGA and ASIC design. Results show the hardware overhead of our design is 16.5% less than common designs and the execution time is shorter than other coprocessors.
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