Printer Component Tag Encryption Mask for Dynamic Data Security
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Solution Overview
Problem
Existing printing systems face challenges in protecting proprietary information stored in replaceable printer components' on-board memory from unauthorized access and eavesdropping, especially when encrypted data locations change over the component's lifetime.
Innovation Solution
A replaceable printer component with a memory device that uses a tag encryption mask to indicate whether data is encrypted or unencrypted, allowing the printer controller to decrypt encrypted data during read operations and encrypt it during write operations, ensuring secure and dynamic storage of encrypted information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If encrypted data is stored in fixed locations in the memory device, then unauthorized access can be prevented, but the system cannot adapt to changing encryption requirements over the component's lifetime
Solution Approach 1:
The patent implements a dynamic encryption mask stored in the memory device that can be updated over time. The encryption mask contains variable information about encryption algorithms, key lengths, and data locations, allowing the system to adapt to changing security requirements while maintaining reliable protection through continuous unauthorized access prevention.
2Reliability
If proprietary information is protected from viewing and unauthorized modifications, then security is improved, but authorized access and updates become more complex
Solution Approach 1:
The patent introduces an encryption mask as an intermediary layer between the memory device and the printer controller. This mask acts as a mediator that automatically manages encryption/decryption operations, reducing the complexity of authorized access while maintaining strong security protection through automated cryptographic operations.
3Object-affected harmful factors
If encrypted data locations are made dynamic and change over time, then security against eavesdropping is improved, but the system complexity increases
Solution Approach 1:
The patent segments the memory device into multiple data blocks with different encryption requirements. The encryption mask is divided into multiple fields (algorithm type, key length, data location, etc.), allowing the system to manage complex encryption operations through modular, organized segments rather than a monolithic complex system.
Data Source
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AI summary
A replaceable printer component includes a memory and a communication link. The memory stores a tag encryption mask and data. The data is stored in a plurality of portions of the memory where each portion is defined by a tag. The tag encryption mask indicates an encryption status of each portion of the memory defined by a tag. The communication link is configured to communicatively link the memory to a printer controller when the replaceable printer component is installed in a printing system.