Gateway Device Encryption for Secure Payment Transactions
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Solution Overview
Problem
Existing electronic payment systems face challenges in securing sensitive information during transactions, with data often being communicated in unencrypted form, making it vulnerable to unauthorized access and misuse.
Innovation Solution
Implementing an End to End Encryption Security Model that uses data encryption, Tamper Resistant Security Modules, Hardware Security Modules, and physical access protections to ensure that sensitive payment account and processing data are protected throughout the transaction process, from data entry to authorization and settlement, using encryption techniques and secure key management to maintain data integrity and confidentiality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If sensitive information is communicated in unencrypted form, then ease of operation is improved, but security is worsened
Solution Approach 1:
The patent segments the encryption process into multiple stages: merchant device-specific encryption at the point of sale, gateway device decryption and re-encryption, and host device final processing. This segmentation allows sensitive information to be encrypted at the source while maintaining operational simplicity for end users, resolving the contradiction between ease of operation and security.
Solution Approach 2:
The gateway device serves as an intermediary between the merchant device and the host device. It receives encrypted transaction data, decrypts it using gateway-specific keys, and re-encrypts it for transmission to the host. This intermediary approach maintains security while enabling seamless operation without requiring end users to understand or manage encryption processes.
2Reliability
If encryption is implemented throughout the transaction process, then security is improved, but device complexity is worsened
Solution Approach 1:
The patent implements local quality by assigning different encryption capabilities to different devices in the system. The merchant device has encryption capability for initial protection, the gateway device has decryption and re-encryption capability, and the host device has final processing capability. This distributed approach maintains high security while managing device complexity through specialized functions rather than requiring all devices to have full encryption suites.
Solution Approach 2:
The system performs preliminary encryption at the merchant device before data leaves the point of sale. This preliminary action ensures security is established early in the transaction process, allowing subsequent devices to work with already-encrypted data and reducing their security implementation complexity.
3Reliability
If multiple encryption keys are used, then security is improved, but loss of time is worsened
Solution Approach 1:
The gateway device performs decryption and re-encryption operations in advance before data is transmitted to the host device. This preliminary processing ensures that security transformations are completed proactively, minimizing delays during actual transaction processing and reducing perceived loss of time for end users.
Solution Approach 2:
The patent implements efficient key management that allows the gateway device to quickly switch between merchant device-specific keys and gateway-specific keys. This enables rapid decryption and re-encryption operations, rushing through the security transformation process to minimize time loss while maintaining multiple encryption layers.
Data Source
AI summary
An electronic payment transaction involves operating a gateway device in an electronic payment system to receive first encrypted transaction data from a merchant device, wherein the first encrypted transaction data is encrypted by means of a merchant device-specific encrypting key. Decrypted transaction data is produced by using a merchant device-specific decrypting key to decrypt the first encrypted transaction data. Second encrypted transaction data is derived from the decrypted transaction data, wherein the second encrypted transaction data is encrypted by means of a gateway device-specific encrypting key. The gateway device communicates the second encrypted transaction data to another electronic payment system server. A key transmission block received from the merchant device includes information that enables the gateway device to derive the merchant device-specific decryption key.