Offline Payment Authentication Using Encrypted TOTP Validation
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Solution Overview
Problem
Existing dynamic authentication systems for electronic payment transactions are vulnerable to interception and require constant network connectivity, lacking robustness against man-in-the-middle attacks and failing to seamlessly integrate with existing payment infrastructures.
Innovation Solution
A system that generates and verifies dynamic authentication codes using encrypted time-based one-time passwords (TOTPs) on user devices, allowing offline generation and validation, with a centralized platform managing the lifecycle of these codes and integrating with existing payment systems, while providing fallback mechanisms for system unavailability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If constant communication between user device and central server is implemented for dynamic authentication, then authentication security is improved, but network dependency increases and system robustness deteriorates
Solution Approach 1:
The system performs preliminary actions by generating and storing authentication codes locally on the user device before network communication is needed. The code generation capability is pre-configured with secret keys and algorithms, allowing the device to autonomously produce valid authentication codes without real-time server interaction, thus resolving the contradiction between security and network independence.
Solution Approach 2:
The user device is empowered with self-service capability to generate authentication codes using locally stored cryptographic materials. This self-contained code generation eliminates dependency on continuous network communication while maintaining security, as the device can independently produce valid codes even when disconnected from the server.
2Object-affected harmful factors
If encrypted data items are stored centrally for validation, then security against interception is improved, but system complexity increases
Solution Approach 1:
The system extracts the most sensitive cryptographic materials (secret keys) and stores them securely in a centralized location, while keeping only the non-sensitive authentication codes on user devices. This separation allows centralized security management without requiring the entire system to be complex, as only the central storage needs high-security measures.
Solution Approach 2:
Authentication codes serve as intermediaries between the centralized secret key storage and the verification process. These codes can be transmitted and validated without exposing the actual secret keys, thus providing interception resistance while maintaining a manageable system architecture where the complex cryptographic operations are isolated to specific components.
3Ease of operation
If dynamic authentication codes are generated offline on user devices, then network connectivity requirements are reduced, but integration with existing payment infrastructure becomes more difficult
Solution Approach 1:
The system changes the parameters of authentication by using time-based one-time passwords (TOTP) that are generated offline but maintain compatibility with existing payment systems. By adjusting the time synchronization parameter and code format to match industry standards, the system enables offline generation while ensuring seamless integration with current payment infrastructure that expects standardized authentication codes.
Data Source
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AI summary
A system for dynamic authentication of payment transactions comprises a first computing system communicatively coupled to a computer communications network. The first computing system receives an activation request for a payment instrument from a second computing system, generates and transmits an activation token to the second system, receives an encrypted data item from the second system, and stores the encrypted data item with a payment instrument identifier. During a transaction, the first system receives a verification request with a dynamic authentication code from a payment issuer, retrieves the stored encrypted data item, validates the dynamic code using the data item, and transmits a verification result to the issuer indicating whether the transaction is authenticated based on the validation outcome. The system enables secure dynamic authentication without requiring constant communication between devices.