Title:
ALL-DIGITAL CAMOUFLAGE CIRCUIT
Document Type and Number:
WIPO Patent Application WO/2020/106339
Kind Code:
A3
Abstract:
Described are technologies of all-digital camouflage circuits. The camouflage circuit can include a first chain of inverters, synthesized with a first standard cell with a first transistor threshold, and a second chain of inverters, synthesized with a second standard cell with a second transistor threshold that is different than the first transistor threshold. A first flip-flop receives a first output of the first chain as a data input and a second output of the second chain as a clock input. A second flip-flop receives the second output as a data input and the first output of the first chain as a clock input. Given the different transistor thresholds, one flip-flop always outputs an active signal that corresponds to an input signal applied to the first chain and the second chain. The other flip-flop always output a constant signal, such an always low signal.
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Inventors:
BEST SCOTT C (US)
Application Number:
PCT/US2019/046631
Publication Date:
July 02, 2020
Filing Date:
August 15, 2019
Export Citation:
Assignee:
CRYPTOGRAPHY RES INC (US)
International Classes:
H03K19/177; G06F21/75
Domestic Patent References:
| WO2017176381A2 | 2017-10-12 |
Foreign References:
| US20180247902A1 | 2018-08-30 | |||
| US20170110418A1 | 2017-04-20 | |||
| US6825698B2 | 2004-11-30 | |||
| US9479176B1 | 2016-10-25 |
Attorney, Agent or Firm:
GRANGE, Kevin O. (US)
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