Smart Card One-Time Password Generation and Display
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Solution Overview
Problem
Existing smart cards with display functionality for generating one-time passwords require external terminals for both generation and display, making them cumbersome and prone to security risks due to high electricity consumption and the need for external power sources.
Innovation Solution
A smart card with integrated microprocessor and display control logic allows for on-card generation and display of one-time passwords without external aids, using a power-saving display control logic and internal energy sources, enabling secure and convenient electronic transactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a smart card uses external terminals for generating and displaying one-time passwords, then the card can perform secure authentication, but the device complexity and ease of operation deteriorate due to requiring external aids
Solution Approach 1:
The patent combines the one-time password generation device and display functionality into a single integrated smart card unit. The microprocessor generates the one-time password internally, and the display control logic directly outputs it to the card's display, eliminating the need for separate external terminals for both generation and display operations.
Solution Approach 2:
The smart card is designed to perform multiple functions within a single device: it serves as both the authentication credential holder and the one-time password generation/display device. The microprocessor and display control logic work together to provide complete authentication functionality without requiring additional external equipment.
2Illumination intensity
If a smart card uses external terminals with high power consumption for display, then the display functionality is achieved, but the use of energy deteriorates due to high electricity consumption
Solution Approach 1:
The smart card uses its own internal power source to operate the display control logic and display, rather than relying on external power sources. The microprocessor manages the power distribution internally, allowing the card to independently control and display one-time passwords without requiring external terminal power supply.
3Reliability
If a smart card requires external terminals for one-time password generation, then the authentication function is provided, but the device complexity increases due to needing additional external equipment
Solution Approach 1:
The patent merges the one-time password generation capability into the smart card's microprocessor, integrating what would otherwise require separate external terminal equipment. The display control logic further integrates the display function directly into the card, creating a self-contained authentication device.
4Ease of operation
If a smart card uses integrated display control logic and internal power source, then the ease of operation improves by eliminating external aids, but the manufacturing complexity may increase
Solution Approach 1:
The patent integrates multiple functional components (microprocessor, display control logic, power source) into a single smart card unit. This consolidation eliminates the need for multiple separate components and their interconnections, simplifying the overall system architecture despite the increased integration requirements.
Data Source
AI summary
The invention creates a data carrier, in particular chip card, in particular smart card, having a device for generating one-time passwords and having a display for displaying generated one-time passwords. Preferably the data carrier is a Eurocheque card or credit card with the integrated function of an electronic purse (cash card function) and the generated one-time password is a transaction number (TAN) for acknowledging a secure electronic payment transaction.