CISM · Question #717
Which of the following is the MOST effective way to protect the authenticity of data in transit?
The correct answer is A. Digital signature. Digital signatures are the most effective way to protect data authenticity in transit because they cryptographically bind the sender's identity to the message - any tampering invalidates the signature, proving both origin and integrity. Access controls (B) restrict who can…
Question
Which of the following is the MOST effective way to protect the authenticity of data in transit?
Options
- ADigital signature
- BAccess controls
- CPrivate key
- DPublic key
How the community answered
(41 responses)- A90% (37)
- B5% (2)
- C2% (1)
- D2% (1)
Explanation
Digital signatures are the most effective way to protect data authenticity in transit because they cryptographically bind the sender's identity to the message - any tampering invalidates the signature, proving both origin and integrity. Access controls (B) restrict who can access data but do nothing to verify authenticity once data is moving across a network. A private key (C) and public key (D) are components of the asymmetric cryptography system that makes digital signatures work - they are mechanisms, not protections in themselves; a signature requires both working together, making neither alone the answer.
Memory tip: Think of a digital signature like a wax seal on a letter - it proves who sent it and shows if anyone broke it open. "Authenticity = signature" is the pairing to lock in.
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