Low Voltage Drive Circuit Analog Encryption
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Solution Overview
Problem
Existing data communication systems face challenges in securely transmitting analog signals due to their susceptibility to corruption and the difficulty in encrypting analog data, which is essential for protecting against hacking and disturbances during transmission.
Innovation Solution
The implementation of Low Voltage Drive Circuits (LVDCs) that convert digital data into encrypted analog signals for secure transmission, using encryption techniques such as polynomial encoding and modulation to ensure secure communication, particularly through screen-to-screen connections, while preserving signal frequency when necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If analog signals are transmitted directly without encryption, then bandwidth usage is reduced and processing cost is lowered, but security is compromised and susceptibility to corruption increases
Solution Approach 1:
The patent introduces an intermediary encryption circuit that sits between the analog signal source and transmission medium. This circuit applies cryptographic transformations (such as polynomial encoding or chaotic mapping) to the analog signal without requiring full analog-to-digital conversion, thereby providing security while maintaining analog signal benefits. The encryption circuit acts as a mediator that protects the signal without completely transforming its nature.
Solution Approach 2:
The patent changes the parameter domain by which encryption is applied. Instead of converting the entire signal to digital domain for encryption, the invention applies encryption transformations directly in the analog domain by modifying signal parameters such as amplitude, frequency, or phase through cryptographic functions. This allows security to be implemented while preserving the analog nature and bandwidth efficiency of the original signal.
2Reliability
If analog to digital conversion is performed for encryption, then security is improved, but bandwidth usage increases and processing cost rises
Solution Approach 1:
The patent extracts only the essential encryption function from the complete analog-to-digital conversion process. By separating the encryption operation from full digitization, the system applies cryptographic transformations solely to the analog signal without requiring complete conversion to digital domain. This extraction approach provides data protection while avoiding the high energy costs associated with full ADC and digital processing.
Solution Approach 2:
The patent employs simpler, lower-energy encryption methods that can be applied directly to analog signals rather than expensive, energy-intensive digital encryption systems. The analog-domain encryption uses computationally lighter operations (such as analog polynomial encoding or chaotic signal mixing) that consume less processing energy while achieving adequate security for the transmission scenario.
3Object-affected harmful factors
If encryption is applied to analog signals, then security against hacking is improved, but signal processing difficulty increases
Solution Approach 1:
The patent inverts the conventional approach by applying encryption in the analog domain rather than converting to digital for encryption. This reversal allows the system to maintain the simplicity of analog signal processing while incorporating security. The encryption is applied through analog circuit operations that are as straightforward as traditional analog processing, eliminating the need for complex digital signal processing chains.
Data Source
AI summary
A method includes generating, by a transmit digital to analog circuit of a low voltage drive circuit (LVDC), analog outbound data. The analog outbound data includes a direct current (DC) component and an oscillating component at a first frequency. The method further includes generating, by an analog transmit encryption signal generator of a transmit encrypt module of the LVDC, an analog transmit encryption signal having at least one frequency component, multiplying, by a mixer of the transmit encrypt module, the analog outbound data with the analog transmit encryption signal to produce an encrypted transmit signal having frequency components that differ from the first frequency. The method further includes generating, by a power source circuit of a drive-sense circuit of the LVDC, the encrypted analog outbound data as an analog transmit signal of a bus signal based on analog inbound data.