New Delhi, Sept. 28 -- Passwords are a pain. Every service wants one, none of them can be the same, and "password123!" doesn't cut it anymore (and never really did). Security experts tell us to use long, unique passwords everywhere-but unless you've been blessed with the memory of an elephant, there's no way you can keep track of dozens of 16-character strings that look like they were generated by a cat walking across the keyboard.

The good news? You can have strong, secure passwords without losing your mind-or your Netflix login. Here's how.

You've probably tried the classic tricks: replace letters with numbers ("P@ssw0rd"), add your birth year, or recycle a base word with slight variations across accounts. The problem? Hackers know th...