A Man-in-the-Middle (MITM) attack is a form of cyberattack where an attacker secretly intercepts and manipulates communication between two parties without their knowledge.

In a typical MITM scenario, the attacker positions themselves between a user and a legitimate service. They can eavesdrop on sensitive data exchanges or inject malicious content into the communication.

MITM attacks often target unsecured public Wi-Fi networks and use techniques like ARP spoofing and DNS hijacking to intercept communications.

Additional Information:
MITM attacks pose significant threats to online banking, email communication, and secure login systems. Attackers may steal credentials, manipulate transactions, or distribute malware.

Preventive measures include the use of HTTPS, VPNs, secure network configurations, and certificates like TLS to encrypt communications. End-to-end encryption is critical for preventing MITM attacks.

Formal Definition:
A Man-in-the-Middle (MITM) attack occurs when a malicious actor secretly intercepts, monitors, or alters communication between two parties without their consent.