Think of a question to which the answer is known only to you and your contact. Enter the question and answer, then wait for your contact to enter the answer. If the answers do not match, the communication channel you are using may be under surveillance.
Zamislite pitanje na koje odgovor zna samo vaš kontakt. Unesite pitanje i odgovor, te sačekajte sugovornika da unese odgovor. Ukoliko se odgovori ne podudaraju, komunikacijski kanal je možda pod nadzorom.