Requirement Analysis: The application must process each credit card data validation request at least once, securely and cost-effectively.
SQS FIFO Queues: Ensures that each message is processed exactly once and in the exact order sent.
AWS Lambda: Using Lambda for event-driven processing ensures scalability and cost-efficiency.
SSE-SQS: Provides encryption at rest using SQS-managed keys, simplifying encryption management.
Implementation:
Set up SQS FIFO queues as the event source for Lambda.
Enable SSE-SQS for encryption.
Ensure the Lambda execution role has the necessary permissions to use the encryption keys.
Conclusion: This combination meets the requirements of security, exact-once processing, and cost-effectiveness.
References
Amazon SQS:Amazon SQS Documentation
AWS Lambda with SQS:Using AWS Lambda with Amazon SQS
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