Contemporary psychological warfare has a number of instruments, including deepfakes, in which the human image is synthesized, based on AI algorithms. At first deepfakes appeared for entertainment. Special software based on artificial intelligence offers the opportunity to create clones that look, speak and act just like their templates. However, today the potential for deepfakes to be used maliciously is growing, whereby one creates a clone of a well-known figure and manipulates his or her words. This chapter analyses a wide range of examples of deepfakes in the modern world, as well as the Internet-services that generate them. It will also consider the possibility of using artificial intelligence to prevent their spread, as they constitute a serious threat to psychological security.