Cybersecurity expert Cody Barrow advises individuals to create secret passwords with friends and family to distinguish genuine communication from AI deepfakes, which are becoming increasingly sophisticated. He emphasizes that the rise of AI has made it easier for cybercriminals to impersonate others and that many people have likely had their personal information compromised due to past data breaches. Barrow highlights the importance of these precautions, especially for vulnerable populations like the elderly and inexperienced internet users, in light of recent major breaches, including one affecting M&S.