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CAS-005 · Question #312

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

The correct answer is C. Transmitting confidential data to a CSP for processing on a large number of resources without. Homomorphic encryption is best used for transmitting and processing confidential data on cloud service provider resources without exposing it in plaintext.

Submitted by andreas_gr· Mar 6, 2026Security Engineering

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

How the community answered

(26 responses)
  • B
    4% (1)
  • C
    88% (23)
  • D
    8% (2)

Why each option

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

AProcessing data on a server after decrypting in order to prevent unauthorized access in transit

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.

BMaintaining the confidentiality of data both at rest and in transit to and from a CSP for

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.

CTransmitting confidential data to a CSP for processing on a large number of resources withoutCorrect

Homomorphic encryption allows cloud service providers to perform computations on encrypted data directly, ensuring that the data remains confidential even while being processed on their infrastructure. This capability prevents the CSP from accessing sensitive information in plaintext while still enabling complex analytical tasks across a large number of resources.

DStoring proprietary data across multiple nodes in a private cloud to prevent access by

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

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

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