Merchant Cryptogram Lockbox for Local Key-Based Authorization
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Solution Overview
Problem
Existing credit card transaction authorization systems rely on cryptograms generated by external entities, which can introduce security risks and dependencies, and lack efficient local generation and management capabilities.
Innovation Solution
Implementing a cryptogram lockbox at the merchant's location, which generates cryptograms locally using unique merchant account keys, securely manages keys, and supports key rotation and lifecycle events, reducing external dependencies and enhancing security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If external cryptogram issuers are used for transaction authorization, then transaction processing can be simplified, but security is reduced and dependency on external systems increases
Solution Approach 1:
The patent introduces a cryptogram lockbox as an intermediary component that sits between the external cryptogram issuer and the merchant system. This lockbox receives cryptogram requests, retrieves stored cryptograms locally, and forwards requests to external issuers only when necessary. This intermediary approach maintains simplified transaction processing while enhancing security through local cryptogram storage and reduced external dependency.
2Adaptability or versatility
If external cryptogram generation is used, then local key management flexibility is reduced, but system complexity is decreased
Solution Approach 1:
The patent segments the cryptogram management system into distinct components: a merchant-specific cryptogram lockbox for local storage and retrieval, a key management server for centralized key distribution and rotation, and external cryptogram issuers for backup generation. This segmentation allows flexible key management with different levels of control while distributing system complexity across multiple specialized components rather than concentrating it in one system.
3Reliability
If local cryptogram generation is implemented, then dependency on external systems is reduced, but device complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-storing cryptograms in the merchant-specific lockbox before they are needed for transaction authorization. The system proactively retrieves and caches cryptograms in advance, so when a transaction occurs, the authorized cryptogram is already available locally without requiring real-time external system communication. This reduces operational dependency on external systems while the modular architecture keeps local complexity manageable.
Data Source
AI summary
Systems and methods for using a cryptogram lockbox are disclosed. In one embodiment, in a merchant-specific cryptogram lockbox comprising at least one computer processor, a method for generating a cryptogram locally using a cryptogram lockbox may include: (1) receiving, from merchant backend, a request for a cryptogram comprising an account identifier received from a customer in a transaction; (2) generating a cryptogram for the account identifier using a limited use key for the account identifier; and (3) returning the cryptogram to the merchant backend. The merchant may conduct the transaction using the cryptogram.