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Generating Unbreakable Passwords Introduction

Key-stretching measures which help to make password length manageable in a post-quantum world and.

Estimating the brute force time for passwords of different length.

How to calculate entropy for both pre-quantum and post-quantum strength.

This method is very fast for short and/or non-random passwords. If weak passwords (passphrases) are used, they will be easily discovered by trying every possible character combination in reasonable time through brute-force attacks.

Considering Moore's Law it could have only improved since. Warning: In 2013, nation-state adversaries were supposedly capable of one trillion guesses per second when attempting to brute-force passwords.