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An FPGA Chip Identification Generator Using Configurable Ring Oscillators

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3 Author(s)
Haile Yu ; Dept. of Comput. Sci. & Eng., Chinese Univ. of Hong Kong, Shatin, China ; Leong, P.H.W. ; Qiang Xu

Physically unclonable functions (PUF) are commonly used in applications such as hardware security and intellectual property protection. Various PUF implementation techniques have been proposed to translate chip-specific variations into a unique binary string. It is difficult to maintain repeatability of chip ID generation, especially over a wide range of operating conditions. To address this problem, we propose utilizing configurable ring oscillators and an orthogonal re-initialization scheme to improve repeatability. An implementation on a Xilinx Spartan-3e field-programmable gate array was tested on nine different chips. Experimental results show that the bit flip rate is reduced from 1.5% to approximately 0 at a fixed supply voltage and room temperature. Over a 20 °C-80 °C temperature range and 25% variation in supply voltage, the bit flip rate is reduced from 1.56% to 3.125×10-7.

Published in:

Very Large Scale Integration (VLSI) Systems, IEEE Transactions on  (Volume:20 ,  Issue: 12 )

Date of Publication:

Dec. 2012

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