Secure IC with countermeasure to unpowered physical attack using on-chip photodiode and charge pump
- 주제(키워드) Charge pump , Decapsulation , Invasive attack , Photodiode , Physical attack , Secure circuit , Thin-oxide transistor , Unpowered countermeasure
- 등재 SCOPUS
- 발행기관 Institute of Electrical and Electronics Engineers Inc.
- 발행년도 2021
- 총서유형 Journal
- 회의명 2021 International Conference on Electronics, Information, and Communication, ICEIC 2021
- 일자 31 January 2021 through 3 February 2021
- URI http://www.dcollection.net/handler/ewha/000000181373
- ISBN 9781728191614
- 본문언어 영어
- Published As http://dx.doi.org/10.1109/ICEIC51217.2021.9369784
초록/요약
An unpowered invasive or semi-invasive physical attack on a chip can be a severe threat to the secure data stored in the target chip. This paper presents a secure circuit that can detect unpowered attacks and destroy internal secure data using an on-chip photodiode and charge pump under an unpowered condition. If the chip is under a physical attack including decapsulation, the chip will be exposed to the incident light. The proposed circuit detects the light and converts this light into an electrical signal, which then activates the self-destroying circuit without need for power supply. The self-destroying mechanism uses a gate voltage which is higher than the gate-oxide breakdown voltage that can destroy the transistor of the chip. An on-chip photodiode is used for light sensing. As the harvested voltage from the photodiode is not enough to cause gate-oxide breakdown of the transistor, a charge pump is used to generate the high gate voltage. The charge pump is fabricated using a standard $0.18\ \mu\mathrm{m}$ complementary metal-oxide-semiconductor (CMOS) process with an area of 0.12 mm2. The charge pump output increases to 7 V with a supply voltage of 0.7 V. © 2021 IEEE.
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