Key encryption key wrapping
US11689357B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 2018 |
| Grant date | Jun 27, 2023 |
| Priority date | — |
| Expiry date | Jul 1, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2463/062
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In an example, a method of encryption is described to include generation of a content encryption key and a key encryption key. In that example, the content encryption key is wrapped based on a key wrap operation using the key encryption key and the wrapped content encryption key is encrypted using a policy encryption key. Further in that example, the policy encryption key is encrypted using a public key corresponding to a print apparatus. In an example, a method of decryption is described. The example method of decryption performs recovery of a policy object using a private key corresponding to a print apparatus. In that example, the policy object includes a wrapped key that is unwrapped using a key encryption key to recover a content encryption key usable to decrypt an encrypted electronic document.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.