CAS-005 Question #312: Real Exam Question with Answer & Explanation

Question

Which of the following best describes a common use case for homomorphic encryption?

Options

• AProcessing data on a server after decrypting in order to prevent unauthorized access in transit
• BMaintaining the confidentiality of data both at rest and in transit to and from a CSP for
• CTransmitting confidential data to a CSP for processing on a large number of resources without
• DStoring proprietary data across multiple nodes in a private cloud to prevent access by

Explanation

Homomorphic encryption is best used for transmitting and processing confidential data on cloud service provider resources without exposing it in plaintext.

Common mistakes.

• A. This describes standard encryption practices for data in transit and processing, where data is decrypted for use, which homomorphic encryption aims to avoid during processing.
• B. While homomorphic encryption maintains confidentiality, this choice describes general encryption for data at rest and in transit, not its unique ability to allow computation on encrypted data.
• D. This describes data storage across multiple nodes with general access prevention, which is not the primary or unique use case for homomorphic encryption.

Concept tested. Homomorphic encryption use cases for privacy-preserving computation

Reference. https://aws.amazon.com/blogs/security/use-homomorphic-encryption-to-analyze-encrypted-data-without-decrypting-it/

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