Rekeying keys for encrypted data in nonvolatile memories
US10880082B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Oct 19, 2017 |
| Grant date | Dec 29, 2020 |
| Priority date | — |
| Expiry date | Nov 18, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/222
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In some examples, a device includes a memory controller to, during a power-on process of the device: read encrypted data from a nonvolatile memory, decrypt, using a first key, the encrypted data to produce decrypted data, encrypt, using a second key different from the first key produced as part of rekeying, the decrypted data to produce new encrypted data, and write the new encrypted data to the nonvolatile memory. A power-on code is to prevent booting of the device until all data in the nonvolatile memory has been encrypted using the second key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.