Signal Processing System Key Pairing Security
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Solution Overview
Problem
Current electronic devices face challenges in identifying and pairing with signal transmitting devices to prevent unauthorized copying, while maintaining manufacturing and inventory management convenience.
Innovation Solution
A signal processing system with a processor and memory devices storing master and slave identification keys, where the processor determines if the keys match or are set to an initial value, controlling the system to operate in a limited mode if they do not, thereby preventing unauthorized usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If identification and pairing methods are implemented to prevent unauthorized copying, then security against malicious copying is improved, but device complexity increases
Solution Approach 1:
The identification system is segmented into two separate components: a master identification key stored in the signal processing device and a slave identification key stored in the signal transmitting device. This segmentation allows the security function to be distributed across multiple devices, reducing the complexity burden on any single device while maintaining overall system security.
Solution Approach 2:
The identification keys are pre-stored in memory devices before the actual signal transmission occurs. The pairing process is initiated in advance by comparing these pre-stored keys, allowing the system to establish security credentials before the main operation begins, thereby simplifying the overall security implementation.
2Reliability
If strict identification and pairing verification is performed, then security against unauthorized vendors is improved, but ease of operation deteriorates
Solution Approach 1:
The system performs self-verification by automatically comparing the master and slave identification keys without requiring manual intervention. The signal processing device autonomously determines whether the signal transmitting device is authorized based on the key comparison, eliminating the need for users to manually verify authenticity while maintaining strict security checks.
3Reliability
If limited mode operation is implemented for unauthorized devices, then security is improved, but productivity deteriorates
Solution Approach 1:
When authorization fails, the system implements partial operation by allowing the signal processing device to function in a limited mode where it can still process signals but with restricted capabilities. This partial action maintains security by preventing full unauthorized access while preserving some level of system functionality and productivity.
Data Source
AI summary
A method for identifying and pairing a signal transmitting device, including: obtaining a setting value of a master identification key; obtaining a setting value of a slave identification key; determining whether at least one of the setting values equals to an initial value; determining whether the setting value of the master identification key equals to the setting value of the slave identification key when none of the setting values equals to the initial value; and controlling the signal processing device to operate in a limited mode when the setting value of the master identification key and the setting value of the slave identification key are not equal. In the limited mode, a signal processing device does not output any signal to the signal transmitting device or ignores any signal received from a signal transmitting device, or the signal processing device only outputs a limited signal to the signal transmitting device.