Encrypted Touch Input Bus for Secure Vehicle Data Entry
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Solution Overview
Problem
In motor vehicles, touch input devices lack security for sensitive data entry, as aftermarket devices can intercept and read touch datasets containing PINs, credit card numbers, and passwords, compromising security without allowing aftermarket devices to use the input device.
Innovation Solution
Implementing an encryption mode for touch datasets when sensitive information is requested, using pre-calculated encryption data elements and a linking operation like XOR, ensuring secure transmission and maintaining seamless usability for aftermarket devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If touch datasets are transmitted unencrypted via bus connection, then aftermarket devices can access and use the input device, but security for sensitive input information is compromised
Solution Approach 1:
The patent implements dynamic encryption mode switching where the input device alternates between encrypted and unencrypted transmission modes. During sensitive data entry, encryption is activated to protect PINs, credit card numbers, and passwords. During non-sensitive operations, encryption is deactivated to allow aftermarket device access. This dynamic state change resolves the contradiction by making the system adaptable to different security requirements at different times.
Solution Approach 2:
The patent changes the encryption parameter of touch dataset transmission based on the type of data being entered. When sensitive information is detected or anticipated, the encryption parameter is switched from disabled to enabled state. This parameter change allows the system to maintain backward compatibility for non-sensitive operations while providing security protection when needed, thus resolving the contradiction between accessibility and security.
2Object-affected harmful factors
If encryption is always active for touch datasets, then security for sensitive information is improved, but aftermarket devices cannot use the input device
Solution Approach 1:
The patent implements periodic switching between encrypted and unencrypted transmission modes rather than continuous encryption. The system activates encryption periodically when sensitive data entry is detected, and deactivates it during non-sensitive operations. This periodic action pattern allows aftermarket devices to function during unencrypted periods while ensuring security during sensitive operations, resolving the contradiction between security and compatibility.
Solution Approach 2:
Instead of applying encryption to all transmissions (excessive action), the patent applies encryption only partially to specific transmissions containing or related to sensitive data. This partial application of encryption maintains security for critical information while leaving non-sensitive communications unencrypted, thereby preserving aftermarket device functionality and resolving the contradiction.
3Object-affected harmful factors
If encryption mode switching is implemented, then security for sensitive data is enhanced, but system complexity increases
Solution Approach 1:
The patent implements self-service mechanisms where the input device automatically detects when sensitive data entry is occurring and autonomously switches encryption modes without requiring external control signals. The device monitors the application context and touch patterns to determine when encryption should be activated, reducing the complexity of external coordination while maintaining security. This automatic self-service approach resolves the contradiction by minimizing the operational burden of encryption management.
Solution Approach 2:
The patent employs feedback mechanisms where the system continuously monitors the state of data entry and adjusts encryption mode accordingly. When sensitive information detection algorithms identify patterns indicating sensitive data input, feedback triggers the encryption switch. This closed-loop feedback system automates the complexity of encryption management, reducing manual intervention requirements while ensuring appropriate security measures are applied, thus resolving the contradiction between security and system complexity.
Data Source
AI summary
An approach for operating at least one touch-sensitive, flat input device of a complete device, the input device being connected via a message-based bus connection to a control device of the complete device, and messages containing touch datasets describing touch data events being transmitted to the control device, which evaluates the messages for input information for an application program implemented by the control device, wherein when a security function in the control device that queries sensitive input information is accessed, the touch datasets are transmitted from the input device to the control apparatus via the bus connection in encrypted form until the associated input process has ended.