Low Security Transaction Unit with Security Level Indicator
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Solution Overview
Problem
Current secure transaction units in electronic payment systems require complex technical features like process isolation, tamper-proofing, and secure boot, making them technically complex and difficult to implement, while still needing simpler transaction units that maintain safety and security without these high requirements.
Innovation Solution
A low security level transaction unit is introduced, which permanently stores a security level indicator, allowing direct token exchange between units without the need for complex security features, enabling offline transactions and ensuring confidentiality and safety by blocking token transmission in offline scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex security features (process isolation, tamper-proofing, secure boot) are implemented in transaction units, then security and safety are improved, but device complexity increases
Solution Approach 1:
The system segments transaction units into different security levels (high security level transaction units with complex security features and low security level transaction units without these features). This segmentation allows the system to maintain high security where needed while permitting simpler, less complex units to participate in transactions through the security level indicator mechanism.
Solution Approach 2:
The patent introduces a security level indicator parameter that can be set to different values (first security level indicator for high security units, second security level indicator for low security units). This parameter change allows transaction units to operate with different security configurations, enabling simpler units to function without implementing complex security features while maintaining overall system security.
2Ease of operation
If offline token exchange is enabled, then ease of operation is improved, but security risks increase
Solution Approach 1:
The system performs preliminary verification of security level indicators before allowing offline token exchange. Transaction units check the security level indicator of counterparties in advance, and the system blocks offline transactions from low security level units to high security level units when appropriate. This preliminary security check enables convenient offline operation while preventing security risks through pre-transaction validation.
Data Source
AI summary
A low security level transaction unit is provided for managing transactions in an electronic transaction system, with the transactions including a token exchange. The transaction unit includes means for receiving one or more tokens from another transaction unit in a transaction within the electronic transaction system; and means for permanently storing a security level indicator, the security level indicator is configured to indicate the low-security level of the low-security level transaction unit. The security level indicator is transmitted prior to a token exchange with the other transaction unit in an offline transaction scenario.