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…

Question

Options

• ARisk analysis
• BFirewall security
• CCryptography
• DOODA loop

• A
  4% (1)
• C
  93% (26)
• D
  4% (1)

Explanation

Cryptography is the technique of transforming readable data (plaintext) into an unreadable format (ciphertext) using mathematical algorithms and keys, making it the direct answer - it modifies messages to secure them during transmission and is the backbone of Internet security protocols like HTTPS, TLS, and SSH.

Risk analysis (A) is a management process for identifying and assessing threats - it evaluates security posture but does not itself alter or protect messages in transit. Firewall security (B) filters network traffic based on rules, acting as a gatekeeper between networks, but it doesn't transform or encrypt the content of messages. The OODA loop (D) (Observe, Orient, Decide, Act) is a military decision-making framework sometimes applied to incident response strategy - it has nothing to do with message encryption or transmission security.

Memory tip: Think "crypto = hidden writing" - from the Greek kryptos (hidden). If a technique actually changes the message itself to hide its meaning, that's cryptography; everything else just controls access or assesses risk.

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