Secure Document Rendering with Watermark Merging
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Solution Overview
Problem
Existing document rendering technologies, such as image-based and PDF-based renderers, fail to provide adequate security for watermarks in documents, as they can be easily removed, and lack a text selection capability at the client's end, necessitating sophisticated security measures like digital signing.
Innovation Solution
The method involves creating a graphic that includes non-text objects and a watermark from a source document, merging them into a single bitmap image, and adding text objects to a base document, allowing for text selection while securing the document by embedding the watermark with non-text elements, thus making it difficult to remove.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If watermarks are applied as separate text or image objects in PDF documents, then text selection capability is enabled, but document security is compromised as watermarks can be easily removed
Solution Approach 1:
The patent merges the watermark with non-text elements (images, charts, tables) into a single composite graphic object. This integration makes the watermark inseparable from the document content, preventing easy removal while preserving text selection capability for actual text elements. The watermark becomes part of the graphical structure rather than an independent layer.
2Reliability
If all document elements are rendered as a single bitmap image, then document security is improved through watermark integration, but text selection capability is lost
Solution Approach 1:
The patent segments document elements into two distinct categories: text objects and non-text objects. Text objects remain as selectable text elements, while non-text objects (images, charts, tables) are merged with the watermark into a single graphic. This segmentation allows text selection to function normally while securing the graphical content through watermark integration.
3Reliability
If sophisticated security measures like digital signing are used, then document security is improved, but system complexity increases
Solution Approach 1:
The patent employs a simple yet effective security mechanism using watermarks integrated into graphical elements. Instead of implementing complex digital signing systems, encryption protocols, or authentication frameworks, the solution uses a straightforward visual watermarking approach that provides adequate security for document protection without requiring sophisticated security infrastructure.
Data Source
AI summary
Systems and methods for rendering a secure document with a text selection capability. The methods comprise, by a processor creating a graphic that includes at least one non-text object of a source document and a watermark, adding the graphic onto a base document, and creating a secure document by adding one or more text objects from the source document onto the base document, the secured document configured to enable text selection of the one or more of the added text objects. The secure document includes a file format that is different than that of the source document.