CompTIA CASP+ (CAS-004) — Question 17

Which of the following allows computation and analysis of data within a ciphertext without knowledge of the plaintext?

Answer options

• A. Lattice-based cryptography
• B. Quantum computing
• C. Asymmetric cryptography
• D. Homomorphic encryption

Correct answer: D

Explanation

Homomorphic encryption is specifically designed to allow operations on ciphertexts, enabling computation without revealing the plaintext. Lattice-based cryptography and asymmetric cryptography focus on security mechanisms rather than direct computation on encrypted data, while quantum computing pertains to processing capabilities and does not inherently allow for operations on ciphertext.