I have read that SHA-2 is currently unbroken due to the amount of resources and time it would take to crack the hashing, but if we have the step by step algorithm, why can we not just do the steps backwards?
In: Technology
Because in a hash function, information is lost when you run it. That’s why it is called a hash…it’s like running meat through a grinder. You can’t put it back together again. Except a cryptographic hash is semi-unique.
Keep in mind that you can run a 2000 page document through a hash and get a result that’s 16 bits long.
“*Once bread becomes toast, it can’t go back.*” – Ajax
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