> The chances of a sha256 collision is essentially zero barring a vulnerability being found in sha2. Yes, but to answer the question if you can find the input

> The chances of a sha256 collision is essentially zero barring a vulnerability being found in sha2. Yes, but to answer the question if you can find the input from the hash, the answer is no because it's impossible to be 100% certain as many input can hash to the same value.