KYC exchanges are exchanges that guarantee the safety of their users, there may be some exchanges that do not use KYC, but as such these exchanges are less secure, and look un professional, I really like KYC exchanges because they are of good quality and professional.
In my opinion there is no KYC exchange that completely guarantees the security of our identity from hacking because every online technology based exchange platform is vulnerable to theft, no matter how strong the walls or defenses are, but it is very possible for hackers to break into it anyway. With the development of technology, hackers will also continue to learn and will always try to commit crimes.