With AES-256, if you had a billion GPUs, it would take much longer than the age of the universe to brute-force the key.<p><a href="https:&#x2F;&#x2F;www.reddit.com&#x2F;r&#x2F;theydidthemath&#x2F;comments&#x2F;1x50xl&#x2F;time_and_energy_required_to_bruteforce_a_aes256&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.reddit.com&#x2F;r&#x2F;theydidthemath&#x2F;comments&#x2F;1x50xl&#x2F;time...</a>