Detection of altered documents
US12260174B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2021 |
| Grant date | Mar 25, 2025 |
| Priority date | — |
| Expiry date | Sep 21, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F40/226
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Analyzing and detecting altered documents is accomplished by accessing a target portable document format (PDF) document and extracting document content information from the target PDF document. The extracted document content information is analyzed to generate an intra document model for the target PDF document and then the extracted document content information is evaluated in accordance with the intra document model. Artifacts in the document content information are identified and an intra document score is determined based on the identified artifacts and their respective weightings. The document content information is evaluated again in accordance with one or more inter document models and artifacts in the document content information are again identified and an inter document score is similarly determined. A total alteration score is also determined based on the intra document score and inter document score.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.