Exam-style question
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What is the main purpose of a digital signature?.
- A.To provide evidence about the origin and integrity of digital data
- B.To make a firewall unnecessary
- C.To convert a virus into a worm
- D.To store a user's private key publicly
Model answer
What a good answer should say
- To provide evidence about the origin and integrity of digital data
Explanation
Why this works
A digital signature is used to help show who sent or approved data and whether the data has been changed. It is different from simply encrypting all data for secrecy.
Common mistake
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