But what if you had a super powerful computer to do the guessing? I can’t do this subject justice more than the Reddit post at https://bit.ly/2Dbw9Qd, which I recommend reading in its entirety. While it gets technical, the final paragraph gives you a good idea of what it would take to list all possible 256-bit keys: “So, if you could use the entire planet as a hard drive, storing 1 byte per atom, using stars as fuel, and cycling through 1 trillion keys per second, you'd need 37 octillion Earths to store it, and 237 billion suns to power the device capable of doing it, all of which would take
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