@inproceedings{f0771616aa8e4ed29b89eee9fc0872ef,
title = "Secure IC with countermeasure to unpowered physical attack using on-chip photodiode and charge pump",
abstract = "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.",
keywords = "Charge pump, Decapsulation, Invasive attack, Photodiode, Physical attack, Secure circuit, Thin-oxide transistor, Unpowered countermeasure",
author = "Hyunwoo Heo and Donggeun You and Hyungseup Kim and Yongsu Kwon and Hyoungho Ko and Kim, {Dong Kyue} and Choi, {Byong Deok} and Kim, {Ji Hoon}",
note = "Funding Information: This work was supported by the BrainKorea21Plus (BK21Plus) Program. Publisher Copyright: {\textcopyright} 2021 IEEE.; null ; Conference date: 31-01-2021 Through 03-02-2021",
year = "2021",
month = jan,
day = "31",
doi = "10.1109/ICEIC51217.2021.9369784",
language = "English",
series = "2021 International Conference on Electronics, Information, and Communication, ICEIC 2021",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "2021 International Conference on Electronics, Information, and Communication, ICEIC 2021",
}