They're hard to remember, hackers exploit their weaknesses and fixes often bring their own problems. Dashlane, LastPass, 1Password and other password managers generate strong and unique passwords for every account you have, but the software is complex. Services from Google, Facebook and Apple allow you to use your passwords for their services at other sites, but you have to give them even more power over your life online. Two-factor authentication, which requires a second passcode sent by text message or retrieved from a special app each time you log in, boosts security dramatically but can still be defeated.
