Structured document signature device, structured document adaptation device and structured document verification device
US7639818B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 2004 |
| Grant date | Dec 29, 2009 |
| Priority date | — |
| Expiry date | Aug 29, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/68
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A structured document signature device includes an adaptation policy associator configured to associate each element forming a structured document with an adaptation policy indicating an action which can be adapted to a child element of the element or a value of the element; a hash tree constructor configured to insert a hash value of the child element of the element or a hash value of the value of the element into the structured document as an attribute value of the element, and to construct a hash tree including the hash value; a digital signature adder configured to add a digital signature to a root of the hash tree and the adaptation policy; and an output configured to output the structured document and the digital signature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.