Policy enforcement with associated data
US9547771B2 · kind B2 · utility
6Cited by
32References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 12, 2013 |
| Grant date | Jan 17, 2017 |
| Priority date | — |
| Expiry date | Feb 12, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/20
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Requests submitted to a computer system are evaluated for compliance with policy to ensure data security. Plaintext and associated data are used as inputs into a cipher to produce ciphertext. Whether a result of decrypting the ciphertext can be provided in response to a request is determined based at least in part on evaluation of a policy that itself is based at least in part on the associated data. Other policies include automatic rotation of keys to prevent keys from being used in enough operations to enable cryptographic attacks intended to determine the keys.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.