Can the output value of the sha256 hash function be converted to binary or decimal number? I know that the output is a set of 256bits. Is it possible to convert the output data to an unique representation of zero and one?
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Yes it's possible.
The output-type of a SHA256 (or many other hash algorithms) is raw binary.
So you can use this binary value to convert it to any format you want, i.e. decimal.
SHA256 hash of