Authentication of a device by a cryptographic process
US12158944B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2022 |
| Grant date | Dec 3, 2024 |
| Priority date | — |
| Expiry date | Dec 10, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/84
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A processing method implemented by a first device including receiving first data including a challenge datum; obtaining key data including an encrypted cryptographic key which is masked by executing a cryptographic masking function; receiving an unmasking key; determining the encrypted cryptographic key by executing a cryptographic unmasking function on the basis of the unmasking key; determining a decrypted cryptographic key by a decryption by executing a decryption algorithm with white-box implementation on the basis of the encrypted cryptographic key; determining an answer datum by a cryptographic operation by executing a predetermined cryptographic algorithm on the basis of the decrypted cryptographic key and the challenge datum; and sending the answer datum to authenticate the first device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.