Decryption method and circuit, corresponding device
US11042655B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2019 |
| Grant date | Jun 22, 2021 |
| Priority date | — |
| Expiry date | Dec 23, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/125
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for data decryption comprises receiving, over an AXI bus operating in burst mode, data access requests for data units stored in a memory, subdividing the requests received into requests for encrypted data units and requests for non-encrypted data units, forwarding both requests for encrypted data units and requests for non-encrypted data units towards the memory, retrieving the respective sets of data units over the AXI bus, and applying Advanced Encryption Standard, AES, processing to the requests for encrypted data units by calculating decryption masks for the encrypted data units and applying the decryption masks calculated to the encrypted data units retrieved. Subdividing the requests into requests for encrypted data units and requests for non-encrypted data units is performed depending on data start addresses and security information conveyed by the requests.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.