SY0-301 · Question #734
Digital signatures are used for ensuring which of the following items? (Select TWO).
The correct answer is B. Integrity C. Non-Repudiation. Digital signatures provide integrity by detecting any modification to a message, and non-repudiation by cryptographically binding the sender's identity to the message.
Question
Digital signatures are used for ensuring which of the following items? (Select TWO).
Options
- AConfidentiality
- BIntegrity
- CNon-Repudiation
- DAvailability
- EAlgorithm strength
How the community answered
(26 responses)- A4% (1)
- B92% (24)
- D4% (1)
Why each option
Digital signatures provide integrity by detecting any modification to a message, and non-repudiation by cryptographically binding the sender's identity to the message.
Confidentiality is achieved through encryption, not digital signatures; signatures do not obscure the content of a message.
Integrity is ensured because a digital signature includes a hash of the message content; any alteration to the message after signing will cause the hash comparison to fail upon verification.
Non-repudiation is ensured because the signature is created using the sender's private key, which only they possess, making it impossible to credibly deny having signed the message.
Availability relates to ensuring systems and data are accessible, which is unrelated to the function of digital signatures.
Algorithm strength is a property of cryptographic algorithms themselves and is not something digital signatures are designed to ensure.
Concept tested: Digital signature properties - integrity and non-repudiation
Source: https://csrc.nist.gov/projects/digital-signatures
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