One-Way Authentication Circuit Using Clock-Driven Node States
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Solution Overview
Problem
Existing product authentication processes are inefficient and insecure, particularly in distinguishing between genuine and counterfeit consumables, which poses challenges for manufacturers and authorized suppliers.
Innovation Solution
Implementing a one-way function in electronic devices using a family of one-way functions that modify clock signals and node states based on previous results, combined with authentication, encryption, and hashing processes, to ensure robust and secure authentication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional authentication processes are used, then the authentication can be performed, but the security and robustness against counterfeit products is insufficient
Solution Approach 1:
The patent implements dynamic authentication by making the authentication circuit's behavior dependent on clock signal variations. The circuit processes identical inputs differently based on temporal characteristics of the clock signal, creating a dynamic response that is difficult to replicate. This dynamic behavior enhances authentication security without requiring additional hardware components.
Solution Approach 2:
The patent changes the temporal parameters of the clock signal (frequency, phase, or timing intervals) to create variable authentication conditions. By modifying clock signal parameters rather than hardware configuration, the system achieves multiple authentication states using the same physical circuit, improving security while maintaining device simplicity.
2Ease of manufacture
If identical circuits are used for authentication, then the manufacturing cost is reduced, but the difficulty to replicate authentication signature is increased
Solution Approach 1:
The authentication circuit incorporates feedback mechanisms where the output of the logic circuit is fed back to influence subsequent processing stages. This feedback loop creates complex temporal patterns in the authentication signature that depend on the entire processing history, making replication difficult even with identical hardware while keeping the circuit design straightforward.
Solution Approach 2:
The patent utilizes periodic clock signals with specific timing characteristics to drive the authentication process. The periodic nature of the clock signal creates rhythmic processing patterns that result in authentication signatures containing temporal fingerprints. These periodic actions are easy to implement in identical circuits but produce complex, hard-to-replicate output patterns.
Data Source
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AI summary
The present description relates to a method of implementing a first one-way function, belonging to a family of one-way functions, by a device in which: - a second function (551) takes into account states of digital nodes (51) distributed in circuits (53) of the device implementing third functions; - said states of the nodes (51) depend on a previous result (R) of the first function; and - in which the second function (551) and/or the third functions are one-way functions.