You have a secret that can ruin your life. It’s not a well-kept secret, either. Just a simple string of characters that can reveal everything about you.
The most secure system isn’t any good if it’s a total pain to access. Requiring you to remember a 256-character hexadecimal password might keep your data safe, but you’re no more likely to get into your account than anyone else.
Source: Kill the Password: A String of Characters Won’t Protect You | WIRED
When security by plebeian obscurity is insufficient, what do you do?