Mallory again intercepts, deciphers the message using her private key, possibly alters it if she wants, and re-enciphers it using the public key she intercepted from Bob when he originally tried to send it to Alice.
Mallory, de novo, intercepta e descifra a mensaxe usando a súa clave privada, incluso, se o desexase podería alterala mensaxe e volvería a cifrala usando a clave pública que Bob enviou orixinalmente a Alice.