Recording medium with a signed hypertext recorded thereon signed hypertext generating method and apparatus and signed hypertext verifying method and apparatus
US6697997B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 2, 1999 |
| Grant date | Feb 24, 2004 |
| Priority date | — |
| Expiry date | Aug 2, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06Q20/401
- WIPO fieldIT methods for management
- WIPO sectorElectrical engineering
Abstract
In a hypertext made up of a plurality of linked documents, each document is composed of a document ID, an issuer ID, a property definition, and a signature attached to the document in its entirety. The property definition includes a property name 402, a value 403, a destination document ID 404, and a constraint definition part 405. By setting in the constraint definition part 405 a hash constraint 406 on the destination document 410, a schema ID constraint 407 defining the document type of the document 410, and a constraint 408 restricting the value of a particular property of the document 410, it is possible to make alterations in the contents of a signed document or attach a document and to prevent invalid alterations in the document contents or invalid attachment of a document.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.