Method and apparatus for preparing and verifying documents
US8578168B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 2007 |
| Grant date | Nov 5, 2013 |
| Priority date | — |
| Expiry date | Jan 7, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/80
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method for preparing and verifying a document, comprising the steps of: presenting the document to a document-registering office in a machine-readable format; editing the document to add an identification code associated with a non-copiable object; signing the edited document using a private key of the document-registering office; printing the digitally signed document in a machine-readable form; presenting the document and the object to an inspecting authority; recovering the digitally signed document from the machine-readable form of the printed document; verifying the digital signature of the document-registering office; and verifying that the identification code in the document corresponds to that of the presented object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.