Digitally Signed Custom Color Table Deployment for Imaging Devices

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Solution Overview

Problem

Printing devices face challenges in deploying custom color tables securely due to heightened security configurations that prevent unauthorized file loading, making it difficult to ensure color accuracy for specific image types without compromising device security.

Innovation Solution

The deployment of digitally signed custom color tables using a user device and a computing device, where the custom color table is constructed, digitally signed with the manufacturer's private key, and authenticated by the printing device, ensuring security and authenticity without exposing the private key.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If heightened security configurations are implemented to prevent unauthorized file loading, then device security is improved, but the ability to deploy custom color tables is worsened

Engineering Contradiction:

Improvedevice securityVSAvoidcustom color table deployment

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

A digital signature acts as an intermediary mechanism between the custom color table and the printing device's security system. The signature provides verification of authenticity without requiring the device to accept arbitrary files, thus enabling custom color table deployment while maintaining security through the intermediary authentication layer

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The custom color table is digitally signed in advance before deployment to the printing device. This preliminary authentication action allows the device to verify the table's legitimacy beforehand, enabling secure acceptance of custom color tables without compromising the security configuration

Inventive Principle:

Principle #10Preliminary action

2Manufacturing precision

If custom color tables are deployed to ensure color accuracy for specific image types, then printing quality is improved, but device security is worsened

Engineering Contradiction:

Improvecolor accuracyVSAvoiddevice security

Core Design Contradiction:

Manufacturing precisionVSReliability

Solution Approach 1:

The digital signature serves as an intermediary that bridges the need for custom color tables and security requirements. It allows the printing device to accept custom color tables for improved color accuracy while maintaining security by verifying the authenticity of each table through the signature mechanism

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The authentication mechanism provides feedback to the printing device about whether a custom color table is authorized. This feedback loop enables the device to selectively accept or reject custom color tables based on their digital signatures, ensuring color accuracy for authorized tables while maintaining security

Inventive Principle:

Principle #23Feedback

Data Source

PatentUS11295183B1Deployment of digitally signed custom color table to imaging device

Publication Date: 2022.04.05 HEWLETT PACKARD DEVELOPMENT COMPANY LP

AI summary

A user device constructs a custom color table for an imaging device and transmits the custom color table to a computing device. The computing device digitally signs the custom color table constructed at the user device. The digitally signed custom color table is deployed to the imaging device. The imaging device processes an image using the using the digitally signed custom color table.