科研之友
微信
新浪微博
Facebook
分享链接
摘要
Phyiically Unclonable Constants (PUC) are circuits used to embed unique secret bit-words in chips. We propose a simple PUC, employing two Schottkydiodes in reverse. The difference of the reverse currents of the two diodes is used to charge a capacitance. The charge stops when the two currents become equal. It is shown that this scheme has a single equilibrium point that depends discontinuously from the difference of the two saturation currents. The proposed scheme is studied both theoretically and by means of simulations (0.18 mu m technology). It is shown that the proposed PUC is unbiased (inter distance approximate to 50%), very stable (intra distance from 2.8% to 1.5%) and temperature insensitive (only 0.3% of the cells changes output over a military temperature range). Energy required is predicted to be as small as 0.6 pJ/bit.
- 出版日期2017-9
