Adaptive and efficient database protection and migration with device state changes
US10735385B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 2015 |
| Grant date | Aug 4, 2020 |
| Priority date | — |
| Expiry date | Jan 11, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W12/06
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for data security incorporating device state. The method includes encrypting sensitive data written to an electronic device while the electronic device is in a locked state using a public key of an asymmetric master key pair. The method also includes, in response to detecting that the electronic device enters an unlocked state, converting asymmetric encryption of the sensitive data into symmetric encryption of the sensitive data using a symmetric master key. Encrypting of the sensitive data may include encrypting the sensitive data using a data encryption key (DEK) and encrypting the DEK using the public key. Converting of the asymmetric encryption of the sensitive data into the symmetric encryption may include decrypting the encrypted DEK using a private key of the asymmetric master key pair and re-encrypting the DEK using the symmetric master key without decrypting and re-encrypting the sensitive data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.