The term "Middle Attack" refers to a type of cyber-attack that targets the communication between two parties, typically in online transactions. In this kind of attack, the hacker intercepts and alters the messages being exchanged between the sender and receiver, without either party realizing it. This can result in sensitive information being stolen or manipulated, leading to financial losses or identity theft. Middle attacks are particularly dangerous because they occur within a secure communication channel, making them difficult to detect and prevent.