One-Time Keypad Input via NFC to Block Password Surveillance
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Solution Overview
Problem
Existing security key input systems are vulnerable to physical means of password exposure, such as video recording, leading to security breaches and inadequate physical security measures.
Innovation Solution
A security key input system using a one-time keypad (OTK) that generates a randomly arranged keypad for input, which is transmitted to an output device via NFC or communication modules, ensuring the input is obscured and secure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional password input system is used, then the input process is simple and direct, but the system is vulnerable to physical surveillance and video recording attacks
Solution Approach 1:
The patent implements dynamic key arrangement where the keypad layout changes randomly for each password input session. Keys are repositioned and reassigned to different values, making static surveillance ineffective. The system transitions from a fixed, predictable layout to a dynamic, unpredictable one that adapts with each use.
Solution Approach 2:
The patent introduces an intermediary processing layer between the user input and the actual password value. Instead of directly mapping key positions to password digits, the system uses a random mapping mechanism that acts as an intermediary, transforming the physical key press into an obscured password input that cannot be easily correlated by observers.
2Reliability
If a fixed keypad layout is used, then the input process is familiar and easy to use, but the system allows password exposure through physical means
Solution Approach 1:
The system performs preliminary randomization of the keypad layout before each password input session. By pre-shuffling the key arrangements and storing the mapping temporarily, the system prepares a unique configuration for each use, ensuring that even if surveilled, the captured video cannot be reused for password deduction.
Solution Approach 2:
The patent changes the positional parameters of the keypad keys dynamically. Instead of keeping keys in fixed positions (1 at top-left, 2 at top-middle, etc.), the system randomly reassigns positions and values, changing the spatial parameters of the interface to prevent physical surveillance from being effective.
3Reliability
If password input is obscured to prevent surveillance, then security is improved, but the input process becomes more complex
Solution Approach 1:
The system generates and manages its own random key mappings automatically without requiring user configuration or intervention. The randomization algorithm, key reassignment, and mapping storage are all self-service functions that the system performs autonomously, minimizing the complexity burden on the user while maintaining high security.
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 system effectively reduces the risk of password exposure by obscuring the input process, enhancing security and usability through randomized keypads, even when physical surveillance is present.
Implementation Method 1
a one-time keypad which is randomly arranged by a controller of an input device, and a NFC communication unit for transmitting the one-time keypad generated by the controller to an external device
Data Source
AI summary
Provided is a security key input system using a one-time keypad. The security key input system may include: a keypad input unit configured to output a security keypad including one or more null keys each having no identification mark written thereon, and receive a security key from a user; a control unit comprising a one-time keypad generator configured to generate a one-time keypad; an input terminal comprising an NFC recognition unit configured to provide the one-time keypad generated by the one-time keypad generator to an output terminal through NFC with the output terminal contacted with the input terminal; a display module; an NFC recognition module configured to receive the one-time keypad from the input terminal through the NFC recognition unit; and the output terminal comprising a controller configured to output the one-time keypad received from the NFC recognition module through the display module.