> As an attack that aims at circumventing mutual authentication, or lack thereof, an MITM attack can succeed only when the attacker can impersonate each endpoin

> As an attack that aims at circumventing mutual authentication, or lack thereof, an MITM attack can succeed only when the attacker can impersonate each endpoint to their satisfaction According to the Wikipedia definition a MITM attack must impersonate the end point to each end point. Altering the integrity of a communication or reading the contents thereof does not meet that definition. Also, every part of the Defense and Detection section of the article is specifically about encryption, particularly PKI keys and CA issued certificates. You never said how I am wrong.