Which of the following is a technique used for modifying messages, providing Information and Cyber security, and reducing the risk of hacking attacks during communications and message passing over the Internet?

Computer networks and the Internet are the prime mode of Information transfer today.

Which of the following is a technique used for modifying messages, providing Information and Cyber security, and reducing the risk of hacking attacks during communications and message passing over the Internet?
A . Risk analysis
B . Firewall security
C . Cryptography
D . OODA loop

Answer: C