212-82: Certified Cybersecurity TechnicianDemo

By ECCouncil · Question Mode

QuestionQ34

Information Security Threats and Attacks

Riley sent a confidential message to Louis. Before transmitting it, Riley digitally signed the message with his private key. Louis received the message and verified the digital signature using the corresponding key to ensure that the message had not been altered in transit.

Which key did Louis use to verify the digital signature in this scenario?

  • A Riley's public key
  • B Louis's public key
  • C Riley's private key
  • D Louis's private key
Explanation

Digital signatures are generated using the signer’s private key and verified using that signer’s matching public key. Louis therefore uses Riley’s public key to verify that Riley signed the message and that it was not modified after signing.

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