System and method for obfuscating opcode commands in a semiconductor device
US11509461B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 2021 |
| Grant date | Nov 22, 2022 |
| Priority date | — |
| Expiry date | Jun 24, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/32
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for securing an integrated circuit chip includes obtaining a first value from a first storage area in the chip, obtaining a second value from a second storage area in the chip, generating a third value based on the first value and the second value, and converting a first opcode command obfuscated as a second opcode command into a non-obfuscated form of the first opcode command based on the third value. The first value corresponds to a physically unclonable function (PUF) of the chip. The second value is a key including information indicating a type of obfuscation performed to obfuscate the first opcode command as the second opcode command. The third value may be an inversion flag indicating a type of obfuscation performed to obfuscate the first opcode command as the second opcode command.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.