Cipher accelerator and differential fault analysis method for encryption/decryption operation
US12425213B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 9, 2022 |
| Grant date | Sep 23, 2025 |
| Priority date | — |
| Expiry date | Aug 23, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/12
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A cipher accelerator is provided. An encryption and decryption circuit is configured to perform an encryption and decryption operation according to a control signal. The encryption and decryption operation includes a plurality of normal rounds and a plurality of redundant rounds. A controller is configured to provide a control signal to the encryption and decryption circuit according to a first variable value and a second variable value. The encryption and decryption circuit is configured to divide the normal rounds into a first normal section and a second normal section according to the first variable value, and divide the redundant rounds into a first redundant section and a second redundant section according to the second variable value. The encryption and decryption circuit is configured to perform the first normal section, the first redundant section, the second normal section, and the second redundant section sequentially.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.