Question

Which of the statements below are true about Digital Signatures?

a. for computerized message systems to replace the physical transport of paper-and-ink documents, a method must be found to allow documents to be signed in an unforgeable way
b. one approach to digital signatures is to have a central authority that knows everything and whom everyone trusts; each user then chooses a secret key and carries it by hand to that office; this method is unbreakable
c. public-key cryptography makes it possible for digital signature implementation without using a single trusted authority; if Alice wants to talk to Bob, she encrypts the message with Bob’s public key (available to anyone), next the message can only be decrypted with Bob’s private key (available only to him, and never transmitted anywhere)

Answer 1

The answer is "Option a, and c".

Step-by-step explanation:

Following are the description of the Digital Signature choices:

• To change the physical transportation of paper or link files in the computerized messaging system, some processes should be identified and utilized in digital signatures, which enables documentation to be validated unforgivably.
• Using public-key cryptography, digital signatures, that's an exquisite system, that's why options a and b are correct.
• Digital signatures are not a central authority, that's why the option B is wrong.