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Securing Credit Card Data

MediumSystem Design00:00
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Your question is Securing Credit Card Data. Take a moment with it on the right.

Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).

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Problem

Explain how to secure credit card data at rest and in transit, covering encryption key rotation, password hashing, and zero-trust authentication.