Managing sequential access to secure content using an encrypted wrap
US8793503B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 2011 |
| Grant date | Jul 29, 2014 |
| Priority date | — |
| Expiry date | Mar 7, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/60
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a method for managing sequential access to secure content by a plurality of workflow participants, a key-map file for each of the participants is created. Each of the key-map files contains a subset of encryption and signature keys for the content. The key-map files are sorted in an order that is the reverse of a workflow order in which the workflow participants for which the key-map files were created are to access the secure content. An encrypted later wrap including a later key-map file for a later workflow participant along the workflow order and an encrypted first wrap including a prior key-map file for a prior workflow participant and the encrypted later wrap are created. In addition, the first wrap is incorporated into a document serialization for the content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.