Questions on: sha256

What follows is an educated guess, not certain statements, and is based on Electrum's brainwallet phrases (just figured it'd be a good example), not other schemes or human-generated ones. No, a miner can't easily be tricked into doing it (e. g
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
It could have been done that way, at the cost of increasing the amount of space it takes to store and send block headers. It seems like block header storage was a big concern for Satoshi, (there's even a section in the whitepaper about it) but it's t
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
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
ASCII-encoded hex strings are easily handled by Bitcoin-Explorer. The following recreates results from en. bitcoin
Bitcoin uses both SHA-256 and RIPEMD-160 hashes. Most often a double-round SHA-256 is used, but for address generating, RIPEMD-160 is used because it generates a shorter hash value. RIPEMD-160 has a 160-bit or 20-byte hash value while SHA-256 has a 2