Eavesdropping is a computer fraud technique to

Eavesdropping is a computer fraud and cybersecurity technique that involves the unauthorized interception of private communications. This can include listening to voice calls or monitoring data transmissions (such as emails or instant messages) as they traverse a network.

• Option A is correct: The essence of eavesdropping is the surreptitious monitoring of private traffic to gain access to sensitive information like passwords or financial details.
• Option B describes a Denial of Service (DoS) attack, where the goal is to overwhelm a system so legitimate users cannot access it.
• Option C refers to network disruption or sabotage.
• Option D refers to data destruction, which affects data integrity rather than confidentiality.

Eavesdropping is often classified as a passive attack because the attacker typically does not alter the data, making it difficult to detect.