ISC2 Systems Security Certified Practitioner (SSCP) Practice Question
A healthcare provider is deploying a serverless application on AWS that receives patients' vital-sign data from mobile devices, stores the records in Amazon S3, and invokes AWS Lambda functions for analytics. To comply with HIPAA, the team must minimize exposure of raw PHI, ensure encryption in transit and at rest, and use keys that rotate automatically. Which approach best meets these requirements?
Require TLS 1.2 for all API requests, configure Amazon S3 server-side encryption with S3-managed AES-256 keys (SSE-S3), and rely on Amazon's default key rotation.
Send data over an IPsec VPN without TLS, store records in Amazon S3 Glacier Deep Archive without encryption, and restrict access using bucket policies only.
Enable mutual TLS on Amazon API Gateway, accept only client-authenticated sessions, decrypt the payload in AWS Lambda, then store it in Amazon S3 encrypted with a customer-managed AWS KMS key that has automatic rotation enabled.
Encrypt data in the mobile app with a hard-coded AES key before upload, disable encryption in Amazon S3, and transmit over HTTPS.
Mutual TLS at Amazon API Gateway authenticates each calling device and encrypts the session, providing strong protection for PHI in transit. Decrypting the payload only inside a private Lambda function and immediately re-encrypting it with a customer-managed AWS KMS key (SSE-KMS) limits plaintext exposure to trusted code while giving the organization control over the key, detailed CloudTrail logging, and the ability to enable automatic annual key rotation. The other options fail to meet one or more requirements: relying on SSE-S3 does not give customer key control, hard-coding client-side keys impedes secure rotation, and using an IPsec VPN without TLS or encryption at rest would violate HIPAA safeguards.
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ISC2 Systems Security Certified Practitioner (SSCP)
Cryptography
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