Keep these points in mind about hash functions:
1) With a secure hash function, it is nearly impossible to recover the original input from its hash value, or to find two different inputs that produce the same hash value.
2) A hash function can turn data of any length into an output of fixed length. This output is called a hash value, or digest.
3) To check a transaction, searching for its transaction hash in a block explorer is much more reliable than looking at a screenshot someone sent you.
Mining $BTC is essentially the process of repeatedly calculating SHA-256 hashes to find a result that meets the difficulty requirement.
1) With a secure hash function, it is nearly impossible to recover the original input from its hash value, or to find two different inputs that produce the same hash value.
2) A hash function can turn data of any length into an output of fixed length. This output is called a hash value, or digest.
3) To check a transaction, searching for its transaction hash in a block explorer is much more reliable than looking at a screenshot someone sent you.
Mining $BTC is essentially the process of repeatedly calculating SHA-256 hashes to find a result that meets the difficulty requirement.