Haptic Feedback via Tactile Pulse Conversion for Secure Password Input
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Solution Overview
Problem
Individuals with vision impairments and fine motor skill loss face challenges in using electronic devices, particularly in typing passwords, due to the lack of tactile feedback, which can lead to security vulnerabilities and usability issues.
Innovation Solution
A system that converts input characters into haptic instructions comprising tactile pulses, transmitted from a keyboard to a mobile phone via a personal area network, allowing users to receive feedback without visual inspection and maintaining security by canceling acoustic signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If visual feedback is used for password input, then users can see what they type, but security is compromised due to potential visual interception
Solution Approach 1:
The patent replaces visual feedback with haptic feedback through a tactile feedback device. Instead of displaying characters visually on a screen, the system converts input characters into haptic patterns that users can feel through vibrations or tactile sensations, thereby maintaining security while providing feedback for password input
Solution Approach 2:
The patent introduces a haptic feedback device as an intermediary between the user and the password input system. This mediator translates character inputs into tactile patterns, allowing users to receive feedback without visual exposure of the actual password characters
2Reliability
If no tactile feedback is provided, then security is maintained, but usability deteriorates for users with vision impairments
Solution Approach 1:
The patent substitutes visual feedback mechanisms with haptic feedback mechanisms. By using tactile vibrations and physical sensations instead of visual displays, the system maintains security while becoming accessible to users with vision impairments who can perceive haptic patterns
Solution Approach 2:
The patent changes the feedback parameter from visual (optical) to haptic (mechanical/tactile). This parameter transformation allows the same security-preserving feedback mechanism to serve users with different sensory capabilities, particularly benefiting those with vision impairments
3Ease of operation
If haptic feedback is provided through vibrations, then tactile feedback is achieved, but acoustic noise is generated
Solution Approach 1:
The patent acknowledges that haptic vibrations generate acoustic noise as a byproduct, but this noise can be utilized to mask the acoustic signals generated by the keyboard itself, providing an additional layer of security through acoustic cancellation while maintaining the beneficial tactile feedback
4Ease of operation
If real-time haptic feedback is provided, then user experience is improved, but system complexity increases
Solution Approach 1:
The patent implements a system where the haptic feedback device autonomously converts character inputs into haptic patterns without requiring complex external processing. The device serves itself by having built-in conversion logic that translates keyboard inputs directly into tactile feedback, reducing overall system complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Improves usability and security by providing contemporaneous tactile feedback for password input, reducing the risk of information interception and accelerating the feedback process.
Implementation Method 1
actuating a haptic motor in a mobile phone to cause the mobile phone to vibrate according to the haptic instruction
Implementation Method 2
producing a first acoustic signal from a speaker. Actuating the haptic motor can produce a second acoustic signal. The second acoustic signal can be canceled by the first acoustic signal
Data Source
AI summary
Haptic feedback can be provided by receiving an input character from a first user device, converting the input character to a haptic instruction comprising a plurality of tactile pulses, and outputting the haptic instruction on a second user device to cause the haptic motor of the second user device to vibrate according to the plurality of tactile pulses.