Cryptographic system management
US10778416B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2017 |
| Grant date | Sep 15, 2020 |
| Priority date | — |
| Expiry date | Jun 6, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/80
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of refreshing key material is described for use in a trusted execution environment logically protected from a regular execution environment. The trusted execution environment further comprises a key identifier. New key material is received at the trusted execution environment to replace existing key material. The key identifier is set to a new value to indicate that new key material is present. The new value of the key identifier is provided directly or indirectly to other parties in association with cryptographic outputs provided by the trusted execution environment using the refreshed key material. This approach is described in connection with an application executing securely on a mobile device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.