Technique for protecting secret information of authentication-target apparatus
US12149640B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 29, 2022 |
| Grant date | Nov 19, 2024 |
| Priority date | — |
| Expiry date | Dec 30, 2042 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An authentication system for authenticating an authentication-target apparatus by transmitting challenge data from an authenticating apparatus to the authentication-target apparatus and transmitting response data from the authentication-target apparatus to the authenticating apparatus. The authentication-target apparatus updates ae secret key and an encrypted original key stored in a memory using a new secret key and a new encrypted original key, derives an authentication key based on an original key, and generates the response data based on a challenge data received from the authenticating apparatus and the authentication key. The authentication apparatus derives an authentication key based on identification information of the authentication-target apparatus and an authentication original key, generates response data for verification based on the challenge data and the authentication key, and obtains an authentication result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.