312-50V13 · Question #32
What two conditions must a digital signature meet?
The correct answer is B. Has to be unforgeable, and has to be authentic. The question asks for the essential characteristics that define a valid and secure digital signature.
Question
Options
- AHas to be the same number of characters as a physical signature and must be unique.
- BHas to be unforgeable, and has to be authentic.
- CMust be unique and have special characters.
- DHas to be legible and neat.
How the community answered
(31 responses)- A3% (1)
- B94% (29)
- C3% (1)
Why each option
The question asks for the essential characteristics that define a valid and secure digital signature.
The length of a digital signature is determined by cryptographic algorithms, not by a comparison to physical signatures, and uniqueness is a property of the hash, not the character count.
A digital signature must be unforgeable, meaning only the legitimate signer with the private key can create it, and authentic, ensuring the integrity of the document and the true identity of the signer. These cryptographic properties provide non-repudiation and data integrity for electronically signed documents.
While cryptographic hashes are unique, the presence of 'special characters' is not a technical requirement for a digital signature's validity or security.
Legibility and neatness are characteristics of physical, handwritten signatures, not the cryptographic data that constitutes a digital signature.
Concept tested: Digital signature properties
Source: https://docs.microsoft.com/en-us/windows/win32/seccrypto/digital-signatures
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