Decrypt and encrypt data of storage device
US9323943B2 · kind B2 · utility
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14Claims
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Key dates
| Filing date | Apr 30, 2013 |
| Grant date | Apr 26, 2016 |
| Priority date | — |
| Expiry date | Sep 13, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2107
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Data read from a volume is decrypted using a first key. The decrypted data is encrypted using a second key. The encrypted data is written back to the volume. An access request to a location of the volume is received from a host. Data is encrypted to or decrypted from the location using the first or second key, in response to the access request. The first key is used for the access request if the location has not been decrypted using the first key and encrypted using the second key. The second key is used for the access request if the location has been decrypted using the first key and encrypted using the second key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.