The Science Behind Secure Passwords: What Actually Makes a Password Strong

Most password advice is outdated. Traditional rules about mixing character types in short passwords create combinations hard for humans but relatively easy for computers to crack.

Length Beats Complexity

A 20-character lowercase password is exponentially harder to crack than an 8-character complex one. Each additional character multiplies possibilities astronomically. Passphrases of four random words are more secure and memorable.

Password Managers

The only practical way to use unique strong passwords everywhere is a password manager. It generates random passwords and stores them encrypted. You remember one master password.

Multi-Factor Authentication

Even strong passwords can be compromised through phishing. Multi-factor auth ensures stolen passwords alone are insufficient. Authenticator apps are more secure than SMS codes vulnerable to SIM swapping.