Portable Terminal Security via Dynamic Holding Time and Rarity Detection
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Solution Overview
Problem
The increasing use of portable terminals for electronic money transactions raises concerns about wrongful use, such as stealing electronic values from someone else's device, as these devices can function as both wallets and readers/writers, enabling unauthorized payments.
Innovation Solution
A portable terminal that prompts users to enable near-field communication with a transportable device, acquires identification information, sets a holding time based on the device's rarity of use, and requires specific actions before processing payments, making wrongful use more noticeable and difficult to execute.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a portable terminal is made to function as a reader/writer for electronic money transactions, then the convenience of payment is improved, but the risk of wrongful use and unauthorized transactions increases
Solution Approach 1:
The system performs preliminary actions by acquiring identification information of the transportable device before the payment transaction, determining rarity based on this information in advance, and setting the holding time requirement beforehand. This preliminary assessment of device rarity and pre-setting of authentication requirements prevents unauthorized transactions while maintaining convenience for legitimate users.
Solution Approach 2:
The system implements feedback by monitoring the identification information of transportable devices and determining their rarity based on historical data. This feedback mechanism dynamically adjusts the holding time requirement for each device, creating a responsive security system that adapts to the risk level of each transaction attempt while maintaining smooth operation for recognized devices.
2Reliability
If a holding time requirement is set for near field communication to prevent wrongful use, then security is improved, but the transaction speed and user convenience deteriorate
Solution Approach 1:
The system dynamically adjusts the holding time requirement based on the rarity determination of the transportable device's identification information. For common devices, a shorter holding time is required, while for rare or unrecognized devices, a longer holding time is imposed. This dynamic adjustment maintains security by extending verification for suspicious devices while preserving transaction speed for legitimate, frequently used devices.
Solution Approach 2:
The system changes the parameter of holding time based on the rarity of the transportable device. By varying this temporal parameter according to device identification and historical usage patterns, the system optimizes the balance between security and transaction efficiency, imposing stricter time requirements only when necessary rather than applying a uniform constraint to all transactions.
3Reliability
If identification information is acquired and rarity is determined for each transportable device, then the ability to suppress wrongful use is improved, but the system complexity increases
Solution Approach 1:
The portable terminal performs self-service by autonomously acquiring identification information of the transportable device, determining its rarity based on this information, and setting appropriate holding time requirements without external intervention. This self-contained approach enables the system to independently assess and respond to potential security risks, reducing the need for complex external verification systems while maintaining high security standards.
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
This solution effectively suppresses wrongful use by making attempted thefts more noticeable and inconvenient, thereby reducing the likelihood of unauthorized transactions, especially with less frequently used devices.
Implementation Method 1
The electronic circuit generally operates with electric power generated by electromagnetic induction due to NFC electric waves emitted by the reader/writer
Implementation Method 2
the payer places and keeps his transportable device near the reader/writer operated by the provider of a product or a service for a short time to establish near field communication (NFC) between the transportable device and the reader/writer
Data Source
AI summary
A terminal device can receive application for purchase from a user and comprises a prompter, a setter, and a payment processor. As application for purchase is made by a user, the prompter prompts the user to enable near field communication between a transportable device to be used for making a payment of an electronic value that is paid for a price and the portable terminal. As the near field communication between the transportable device and the portable terminal is enabled, the setter sets any of actions to the portable terminal that are detectable by the portable terminal. The prompter presents the set action for the user to perform. As performance of the presented action to the portable terminal is detected, the payment processor receives the payment of an electronic value from an account associated with the transportable device via the near field communication.