Patent · US Active

Method and system for registering digital documents

US12019788B2 · kind B2 · utility

0Cited by

5References

20Claims

0Family size

Assignee

ENIGIO AB · SE

Inventors

Hans ALMGREN · Bissenkamp, SE
Lars Hansen · Munich, DE
Krisztian Mangold · Källtorp, SE
Mats Stengård · Andersdal, SE

Key dates

Filing date	Feb 28, 2022
Grant date	Jun 25, 2024
Priority date	—
Expiry date	Feb 28, 2042

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2209/60
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

Method for registering and updating an electronically stored and versioned alpha digital document (A) in a digital document register by storing, for each version, not the document but a public ownership key; a digital document hash value; and a digital document signature. The invention is characterised by the steps a) providing a first document version, defined in a document description language to have a defined rendered graphic representation; b) registering said first version; c) providing a second document version by adding a reversibly added part to said first document version, said second version comprising a second set of metadata; and d) registering said second version, in that said second metadata is embedded in the second version without affecting said graphic representation, in that at least a part of the reversibly added part can be unambiguously generated based on the second metadata, and in that the registering in step d comprises storing a hash of the second metadata. The invention also relates to a system.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.