Questions on: hash

Bitcoin uses two rounds of SHA256 on the entire contents of each block (which includes a reference to the previous block) as well as a randomly varied nonce. When the result of those calculations are below a network-determined threshold it is conside
People often talk about SHA256 like it's a single operation, but it isn't. Rather, the input is broken up into 64-byte chunks, and then each chunk is put into a compression function. The state of the hash partway through hashing something does not de
I guess it depends on what you want to do with it. If for example you're using those 20 bytes as keys in a lookup table, then you should be fine as long as you remember you might get an occasional false positive so you always double check if it reall
How to calculate the target from bitsLet's start with a block-header, always 80-bytes that looks like this: 04000000b9e2784a84e5d2468cee60ad14e08d0fee5dda49a37148040000000000000000e9dd2b13157508891880ef68729a1e5ecdde58062ebfa214a89f0141e5a4717faefd2b
I am working in a computational research lab, and we're taking a look at Bitcoin. I'm trying to develop a simulation of Bitcoin mining for a nonexistent computer architecture. I want to simulate the mining of a single block (say
Conversion from ECDSA public key to Bitcoin Address This article may be too technical for some users. The more basic article on Bitcoin Addresses may be more appropriate. A Bitcoin address is a 160-bit hash of the public portion of a public/private E
The hashing function used in Bitcoin is deterministic, that is hashing the same input, i. e. , block header, will always result in the same output
A hash is the output of a hash function, which is a one-way functions, where knowing the output doesn't help figure out what the input was. They can sometimes serve as short, unique, identifiers for the data that was passed into the function, in orde
As I understand your question it has two parts. One is how to calculate an approximation of someone's hash rate externally, like from a server or proxy that can see their mining results but not their actual hashing process or hash rate. The other par