Method and apparatus for tracking and controlling e-mail forwarding of encrypted documents
US7373330B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 8, 2003 |
| Grant date | May 13, 2008 |
| Priority date | — |
| Expiry date | Sep 14, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L51/234
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In response to a request from a content server to forward an encrypted document to a recipient user, a forwarding engine in the content server prepares an e-mail message that contains a link to the document publisher and an identifier for the document. Upon receiving the e-mail, the recipient user can log onto a content server in the publisher and the publisher content server resolves the link, downloads a secure viewer program and an encrypted version of the requested document to the viewer program. Subsequently, the secure viewer program requests a decryption key for the encrypted document and decrypts the document. The recipient user can then view the document content in secure viewer but cannot copy or print the document without permission from the publisher.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.