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Results tagged with hash
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user 9340
A hash is the output of a hash function, a function which is a mathematically reproducible but irreversible process that takes in an arbitrary length input and produces a fixed length output. The same input will always result in the same output. Hashing is central to Bitcoin mining as well as the generation of Bitcoin addresses.
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Why you need to rehash each block after a changed block when changing data in a blockchain?
The blockhash is a hash that includes the previousblockhash as input.
Suppose you are trying to change the data in block 9000. … You now have a block 9000 with a new hash, so block 9001 has the wrong value in previousblockhash. …
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