Man-in-the-Middle (MitM) Attacks: Intercepting and altering communication between users and web applications.

Man-in-the-Middle (MitM) attacks are a type of cyber attack where the attacker intercepts and potentially alters the communication between two parties without their knowledge. Here's a step-by-step explanation:

1. Interception: The first step in a MitM attack is interception. In this step, the attacker places themselves between the communication of the two parties (the 'man in the middle'). This can be done in various ways, such as by exploiting vulnerabilities in a network or by tricking a user into connecting to a fake network.

2. Decryption: Once the attacker has intercepted the communication, they may need to decrypt it if it is encrypted. This can be done using various methods, such as brute force attacks or by exploiting vulnerabilities in the encryption algorithm.

3. Alteration: After decrypting the communication, the attacker can then alter the content if they wish. This could involve changing the message, inserting malicious code, or even impersonating one of the parties.

4. Re-encryption and delivery: After altering the communication, the attacker then re-encrypts it and sends it on to the intended recipient. The recipient, unaware of the interception and alteration, receives and processes the communication as if it came directly from the original sender.

5. Monitoring: Throughout this process, the attacker can continue to monitor the communication between the two parties, intercepting and altering further messages as they wish.

MitM attacks can be very dangerous as they can lead to the theft of sensitive information, such as login credentials or personal data, and can also be used to spread malware.