Secure Printing System Using Cryptographic Security Identifiers
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Solution Overview
Problem
Existing secure printing systems are vulnerable to tampering during document production, especially in less secure environments, as users can exploit visual security features by capturing and reusing them in unauthorized documents.
Innovation Solution
A method and system that generates security identifiers for security elements, replacing references in a nominally print-ready document with these identifiers, and associates them with the printing device to produce a secured document, ensuring that security elements are not exposed to users and preventing unauthorized use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If visual security features are incorporated in printed documents, then document security after printing is improved, but the features become susceptible to manipulation during production in less secure environments
Solution Approach 1:
The patent extracts the security feature generation process from the document production environment. Instead of embedding visual security features directly in the document at the printing site, the system separates security element creation (done securely at a central authority) from document production (done at less secure sites). The security features exist as separate cryptographic elements rather than visual elements in the document.
Solution Approach 2:
The patent introduces cryptographic security elements as intermediaries between the document content and verification process. These elements act as mediators that provide security without requiring visual security features to be present in the document. The security elements are verified through cryptographic means rather than visual inspection, preventing capture and reuse attacks.
2Reliability
If security features are made difficult to reproduce, then unauthorized copying is prevented, but the features may be captured and reused in unauthorized documents
Solution Approach 1:
The patent fundamentally changes the parameter of security features from visual properties to cryptographic properties. Instead of relying on visual complexity that can be captured by cameras, the system uses cryptographic security elements with mathematical properties that are computationally infeasible to reproduce or reuse. The security relies on cryptographic parameters rather than visual parameters.
Solution Approach 2:
The patent replaces the mechanical/optical system of visual security features with a cryptographic system. Instead of using visual elements that can be photographed and replicated, the system uses cryptographic security elements that are verified through mathematical validation. This substitution eliminates the vulnerability to visual capture and reuse attacks.
3Reliability
If documents are printed in secured environments, then tampering during production is prevented, but the printing location becomes restricted and less convenient
Solution Approach 1:
The patent segments the security function from the printing function. The security elements are created and managed by a secure authority, while the actual document printing can occur at any location. This segmentation allows unsecured printing sites to produce secure documents by incorporating cryptographic security elements that were generated securely elsewhere.
Solution Approach 2:
The patent enables printing devices at less secure sites to self-secure their output by automatically incorporating cryptographic security elements during the printing process. The printing device itself performs the security function by integrating the security elements into the document, eliminating the need for human operators to manually apply security features.
Data Source
AI summary
Systems and methods for secured printing are provided. The method includes receiving a nominally print-ready document with the nominally print-ready document including one or more references to one or more security elements. The method also includes replacing the one or more references with one or more identifiers, to generate an intermediate document, and associating the one or more security elements with the one or more identifiers. The method further includes transmitting instructions to a printing device, with the instructions being configured to cause the printing device to associate the one or more identifiers with the one or more security elements. The operations further include transmitting the intermediate document to the printing device.