I am very new to the hashing world and despite hours of research (AKA Googling) I still don't understand this piece of information. What are the different pieces of information that are needed in order to unhash a SHA-256 key to reveal the original message, besides the original message itself? Or if I am way off base, what information do you need that gets you the closest to unhashing the SHA-256 key?
The closest thing I could find was this question and I would comment a question, but unfortunately, I bear the newbie banner.
If this has been answered, a redirect link or some good reading materials outside of Wikipedia would be great! I am just not sure of how/if I am asking the right questions.