Authentication Device with Dynamic Sound-Wave Replay Protection
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Solution Overview
Problem
Existing authentication methods using inaudible sound wave communication face security vulnerabilities due to unauthorized recording, and lack of compatibility with modern devices lacking traditional interfaces, necessitating a secure and efficient transmission method.
Innovation Solution
An authentication device that stores authentication information and counting information, converting it into sound waves using varied methods based on user input counts, altering data arrangement, frequency, and encryption to generate unique sound wave signals for each input, enhancing security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If inaudible sound wave communication is used to transmit authentication information, then no separate communication module is required and pairing process is eliminated, but security vulnerability occurs because authentication information converted into sound waves may leak due to unauthorized recording
Solution Approach 1:
The patent applies dynamics by changing the conversion method of authentication information into sound waves based on counting information that changes according to the number of user inputs. This dynamic transformation ensures that the same authentication information produces different sound wave signals each time, preventing unauthorized recording and playback while maintaining the simplicity of sound wave communication without additional modules
Solution Approach 2:
The patent changes key parameters of the sound wave signal including frequency information and data arrangement order based on counting information. By varying these parameters dynamically, the system transforms authentication information into unique sound wave patterns that cannot be easily recorded or replayed, thus resolving the security vulnerability while preserving the simplicity of the communication method
2Ease of manufacture
If authentication information is converted into sound waves using fixed conversion method, then conversion process is simple, but security is vulnerable to unauthorized recording and playback
Solution Approach 1:
The system transitions from a fixed conversion method to a dynamic one where the conversion method changes based on counting information derived from user inputs. This maintains the simplicity of the conversion process while adding security through variability, as the same authentication information produces different sound wave outputs each time
Solution Approach 2:
The patent implements periodic action by using counting information that increments with each user input to determine the conversion method. This periodic variation in conversion methodology ensures that sound wave signals are continuously transformed in a predictable yet secure manner, preventing replay attacks while maintaining operational simplicity
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
The method improves security by generating distinct sound wave signals for the same authentication information, preventing unauthorized access and leakage, while eliminating the need for additional communication modules and pairing processes.
Implementation Method 1
a control unit configured to convert the authentication information into the sound wave signal by using the conversion method corresponding to the counting information changed according to the number of user inputs
Implementation Method 2
a sound wave output unit configured to output the authentication information converted into the sound wave signal and the changed counting information as a sound wave signal
Data Source
AI summary
Disclosed is an authentication device. The authentication device comprises: a storage unit for storing authentication information and a plurality of counting information corresponding to a conversion method for converting the authentication information into a sound wave signal; a control unit for converting the authentication information into a sound wave signal by a conversion method corresponding to the counting information changed according to the number of user input; and a sound wave output unit for outputting the authentication information converted into the sound wave signal and the changed counting information as a sound wave signal. Accordingly, it is possible to achieve the effect of improving security as the sound wave signal for transmitting the same authentication information is changed according to the counting information.