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In this paper, a secure efficient hierarchical key management scheme (SEHKM) for wireless sensor networks is proposed. It satisfies several requirements of WSN. The design of the scheme is motivated by the constraints of sensor networks and high resources cost in traditional key management techniques. The key management scheme supports the establishment of three types of keys to encrypt messages sent...
This paper describes the high-performance CPU design of a heterogeneous octa-core CPU complex, incorporated into a highly integrated mobile SoC for smartphone applications. The SoC is fabricated in a 28nm high-x metal-gate CMOS, and has a die size of 89mm2. Cu pillars are used for the die-to-substrate interface with fine substrate trace pitch. The SoC is packaged in a 14mmx14mm, 832 ball, 0.4mm pitch...
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