Complicated security measures can put consumers off. You might have experienced this yourself. For example, have you ever been told during the registration process that you need a certain number of characters, capital letters, numbers, and obscure symbols in your password?
Smart security should make life easier for your end users rather than harder. After all, poorly-implemented security makes things less secure.
Instead of complicated passwords, developers could consider utilising platform-specific security features such as fingerprint and face recognition. Or a one click email login.
While you should experiment and make security more simple, keep in mind that consumers are now used to entering passwords. Removing the sign-in process altogether can be disconcerting.
A red flag for your end users is when individual parts of your app - particularly login verification screens - look suspiciously different. You'd be surprised how many big brands still make this mistake.