Which of the following is a technique used by cybercrooks to trick users into revealing confidential information?

Social engineering is a technique employed by cybercriminals to manipulate individuals into divulging confidential information. This approach relies on psychological tactics and human interactions rather than technical vulnerabilities. Attackers may exploit emotions like fear, urgency, or curiosity to convince users to provide sensitive data, such as passwords or credit card numbers.

For instance, a common form of social engineering is phishing, where attackers send emails that appear genuine, urging recipients to click on a link or provide information. This technique is effective because it preys on human trust and the tendency to respond quickly to requests for help or information.

Other options are related to cybersecurity but represent different methods of attack. SQL injection (SQLi) exploits vulnerabilities in web applications to interact with databases, while Man-in-the-Middle (MITM) attacks involve intercepting communication between two parties to steal information. DDoS (Distributed Denial of Service) attacks aim to overwhelm a target system or network, rendering it inaccessible, which doesn't involve tricking users into revealing information.