Why is it important to use different secret keys for signing access tokens and refresh tokens in NestJS?

hard📝 Conceptual Q10 of 15

NestJS - Authentication

ATo limit the impact if one key is compromised and improve security

BTo make token verification faster

CTo allow tokens to be interchangeable

DThere is no need; one secret is enough

Step-by-Step Solution

Solution:

Step 1: Understand secret key roles
Different secrets isolate token types so compromising one does not affect the other.
Step 2: Evaluate other options
Using one secret risks both tokens if leaked; different secrets do not affect speed or interchangeability.
Final Answer:
To limit the impact if one key is compromised and improve security -> Option A
Quick Check:
Separate secrets improve token security [OK]

Quick Trick: Use separate secrets for access and refresh tokens [OK]

Common Mistakes:

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