CAS-005 · Question #227
CAS-005 Question #227: Real Exam Question with Answer & Explanation
The correct answer is D: One-time pad. The company needs a highly secure method to transfer highly sensitive documents over an insecure network, guaranteeing encryption even if traffic is intercepted.
Question
A company needs a highly secure method to transfer documents over an insecure network. The documents are highly sensitive, and the documents' encryption must be guaranteed even if the network traffic is intercepted. Which of the following encryption techniques is the best option?
Options
- ASymmetric
- BLightweight
- CAsymmetric
- DOne-time pad
Explanation
The company needs a highly secure method to transfer highly sensitive documents over an insecure network, guaranteeing encryption even if traffic is intercepted.
Common mistakes.
- A. Symmetric encryption relies on a shared secret key and its security depends on proper key management and strength, making it vulnerable to various attacks if the key is compromised.
- B. Lightweight encryption algorithms are designed for resource-constrained environments, which does not inherently guarantee higher security and might offer weaker protection than standard algorithms.
- C. Asymmetric encryption uses public and private key pairs for secure key exchange and non-repudiation but does not offer the theoretical perfect secrecy of a one-time pad.
Concept tested. Perfect secrecy with one-time pad encryption
Reference. https://learn.microsoft.com/en-us/windows/win32/seccrypto/one-time-pad
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