Dual Key Control Mechanism for Non-Repudiable Payment Transactions
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Solution Overview
Problem
Existing electronic payment systems lack adequate measures to conclusively address disputes over transactions, particularly in cases where participants may claim that a transaction never occurred or was altered, leading to potential fraud and lack of non-repudiation.
Innovation Solution
The implementation of a dual key control mechanism within secure token transaction units, which generates unique cryptographic key pairs and combines public keys to create a combined token reference, ensures secure and non-repudiable transactions by requiring active participation from both transaction units and utilizing a token reference register for verification and authentication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If tokens are exchanged directly between token transaction units with cryptographic security, then transaction speed is improved, but transaction reliability deteriorates due to lack of non-repudiation
Solution Approach 1:
The patent introduces a token reference register as an intermediary component that records all token transactions. This register acts as a mediator between token transaction units, providing a centralized ledger that confirms transaction occurrence and enables non-repudiation while maintaining the speed of direct token exchanges.
2Reliability
If a centralized blockchain/distributed ledger is used for token storage, then transaction reliability is improved, but device complexity increases due to online access requirements
Solution Approach 1:
The patent extracts the essential reliability function from complex blockchain systems by implementing a simplified token reference register that only stores token references rather than full transaction histories. This extraction maintains reliability while reducing device complexity and eliminating the need for complex online blockchain access.
3Reliability
If token references are stored in a token reference register, then transaction reliability is improved, but loss of information increases due to additional verification steps
Solution Approach 1:
The patent uses copying by storing only token references in the token reference register rather than complete transaction data. This copying approach maintains reliability through reference verification while minimizing information loss by preserving only the essential token identification information needed for validation.
Data Source
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Figure 3a~3b
AI summary
The invention relates to a secure token transaction unit, such as a wallet, hosted within a service provider unit, within an electronic payment transaction system comprising a token reference register, the secure token transaction unit configured to send a token to another token transaction unit or to receive a token from another token transaction unit within the electronic payment transaction system, the secure token transaction unit comprising a control module adapted to perform a dual key control mechanism, wherein the dual key control mechanism thereby enhancing the security that the payment transaction cannot be tampered with, to enable a non-repudiable proof of the payment transaction.