The two original parties appear to communicate normally in the process. In general, the attacker actively intercepts an exchange of public key messages and transmits the message while replacing the requested key with his own. What is the goal of Cain & Abel MITM attacks? What is Man in Middle Attack?Ī Middleman attack (MITM) is a form of eavesdropping in which communication between two users is monitored and modified by an unauthorized party.