User-specified sharing of data via policy and/or inference from a hierarchical cryptographic store
US8837718B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 2009 |
| Grant date | Sep 16, 2014 |
| Priority date | — |
| Expiry date | Mar 21, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/88
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The claimed subject matter relates to architectures that can construct a hierarchical set of decryption keys for facilitating user-controlled encrypted data storage with diverse accessibility and hosting of that encrypted data. In particular, a root key can be employed to derive a hierarchical set of decryption keys and a corresponding hierarchical set of encryption keys. Each key derived can conform to a hierarchy associated with encrypted data of the user, and the decryption capabilities of the decryption keys can be configured based upon a location or assignment of the decryption key within the hierarchy. The cryptographic methods can be joined with a policy language that specifies sets of keys for capturing preferences about patterns of sharing. These policies about sharing can themselves require keys for access and the policies can provide additional keys for other aspects of policy and or base-level accesses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.