Digital Signatures

Question 1

What are digital signatures?

Answer 1

A digital signature indicates the signer’s agreement with the contents of an electronic document

Question 2

What are the 4 properties of Digital Signatures?

Answer 2

• Authentic
• Unforgeable
• Non-reusable
• Non-repudiable

Question 3

What does it mean that a digital signature must be authentic?

Answer 3

Signer must deliberately sign a document

Question 4

What does it mean that a digital signature should be unforgeable?

Answer 4

Only the signer can replicate their signature

Question 5

What does it mean that a digital signature is non-resuable?

Answer 5

Cannot move a signature from one document to another document or alter a signed document without invalidating the signature

Question 6

What does it mean by digital signatures should be non-repudiable?

Answer 6

Signatures can be validated by others users and signer cannot claim that they did not sign a document bearing their signature.