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ISC2 Systems Security Certified Practitioner (SSCP) Practice Question

Your company exposes a REST endpoint through Amazon API Gateway that invokes an AWS Lambda function. Each business partner receives its own client application and may send up to 10 000 requests per day. Security engineers also want to block replay attacks if a request is intercepted in transit. The Lambda code itself must remain unchanged, and the solution should require minimal development effort. Which approach meets both requirements?

  • Attach an IAM resource policy listing the partners' AWS account IDs and rotate the policy monthly to invalidate any compromised credentials.

  • Associate each partner's API key with an API Gateway usage plan that enforces a 10 000-request daily quota, and require AWS_IAM authorization so partners must sign every request with AWS Signature Version 4 using temporary credentials from an assumed IAM role.

  • Configure an AWS WAF rate-based rule to cap traffic at 10 000 requests per day while continuing to use a shared static API key for all partners.

  • Secure the method with Amazon Cognito OAuth 2.0 access tokens that expire quickly, and rely on default API Gateway throttling for rate limiting.

ISC2 Systems Security Certified Practitioner (SSCP)
Access Controls
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