Hello ! to all ! all good? There are many social engineering atacks, malware, dictionaries, brute force, physically available device, and ultimately, device, close by, since it is possible to simulate a cell phone signal with a portable antenna, this is obviously, if the signal is greater than that of the operator, so the interception of messages occurs, and there is no point in authenticating two factors, so how can we protect ourselves from this, is there protection?