Method for backing up and restoring an encryption key
US8055911B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 7, 2005 |
| Grant date | Nov 8, 2011 |
| Priority date | — |
| Expiry date | Nov 29, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/0894
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention allows creation of a backup key for backing up an encryption key inside a source trusted chip, encrypting the encryption key with the backup key, exporting the encrypted encryption key from the source trusted chip and storing it in a storage device, encrypting the backup key for transmission to a trusted third party. If the encrypted encryption key needs to be restored inside a destination trusted chip, the backup key and the encryption key encrypted with the backup key are imported to the destination trusted chip, where the encrypted encryption key is decrypted with the backup key inside the destination trusted chip to obtain the encryption key of the source trusted chip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.