Managing access to a secure content-part of a PPCD using a key reset point
US8984298B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2011 |
| Grant date | Mar 17, 2015 |
| Priority date | — |
| Expiry date | May 10, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F21/6209
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a method for managing access to a secure content-part of a PPCD, a key reset point of the secure content-part during a workflow among workflow participants is determined. In addition, key-map files comprising subsets of access keys that provide access to the secure content-part during respective content access sessions are generated, in which at least one of the key-map files corresponds to the key reset point and comprises a first decryption key, a first verification key, a second encryption key, and a second signature key, in which the first decryption key does not correspond to the second encryption key, and in which the first verification key does not correspond to the second signature key. In addition, the plurality of key-map files are supplied to at least one of the participants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.