What function does the public key serve in digital signature verification?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. To decrypt the digital signature.
The public key in digital signature verification ensures the authenticity and integrity of a message. When a sender signs a message using their private key, the recipient uses the corresponding public key to decrypt the digital signature. This process verifies that the signature was created by the legitimate sender and that the message has not been altered. If the public key successfully decrypts the signature and matches the message's hash, the signature is valid. This cryptographic mechanism ensures secure communication and prevents forgery in digital transactions.