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Show HN: SHA-256 explained step-by-step visually

sha256algorithm.com

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Re: Show HN: SHA-256 explained step-by-step visually

#6

Post by userbinator »

This reminds me that I've always wanted to make a huge interactive combinatorial circuit that computes SHA-256 and shows all its internal state, then put it on a site with the claim that anyone who can make its output match a certain clearly-constructed value (e.g. 0123456...ABCD...) will win a prize. No mentions of hash algorithms or other such phrasing to deter anyone. I wonder how many people would try such a "logic puzzle", how much time they'd spend on it, and if we might even get the first successful preimage attack from that.

Re: Show HN: SHA-256 explained step-by-step visually

#7

Post by mynameismon »

mabbo wrote: post #5

Before watching this: "Why can't cryptographers just figure out some tricks to crack these hash algorithms?" After watching this: "How can any cryptographer EVER figured out any trick to crack these hash algorithms?!"

> "How can any cryptographer EVER figured out any trick to crack these hash algorithms?!"

More so, "How can any cryptographer EVER figure out any trick to come up with these hash algorithms?!" Seriously, they are incredibly impressive mathematical algorithms. Even coming up with an algorithm that is able to show the avalanche effect is mind boggling. To make sure that the algorithm is not biased to a set of samples AND shows the avalanche effect is tremendously mind blowing.

Re: Show HN: SHA-256 explained step-by-step visually

#9

Post by manceraio »

userbinator wrote: post #6

This reminds me that I've always wanted to make a huge interactive combinatorial circuit that computes SHA-256 and shows all its internal state, then put it on a site with the claim that anyone who can make its output match a certain clearly-constructed value (e.g. 0123456...ABCD...) will win a prize. No mentions of hash algorithms or other such phrasing to deter anyone. I wonder how many people would try such a "log…

I actually started this because my first idea was: can I implement SHA-256 with just TTL logic gates? which should be possible, but it would take months to do.

for puzzles try 12037465 for some coffee :)

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