Questions tagged [hash]

This tag should be used for questions related to hashes. 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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how make own gitian-sigs end detached sigs?

How make own gitian-sigs end detached-sigs. I cannot find any useful info. Where i try see it's always start with "you already have .assert and .sig . but how they create ?
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3answers
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More than one valid hash block

Discovering a new block is a task about generation of millions of hashes in order to find one valid hash, which is a hash less than the current target. The question is: Are there more than 1 valid ...
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Thin Client and OP_RETURN

I'd like to better understand how a light client works. As far as I know, a light client stores locally only the block headers (80 bytes each) and it receives a new block header on average each 10 ...
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What's the most fair mining algorithm

lots of people claim that Bitcoin's mining algorithm is unfair because ASIC has definite advantages over other chips. So, what can be the most fair algorithms that maximizes decentralization of mining?...
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2answers
3k views

Generating Bitcoin Public and Private Keys

I managed to write the below code which will create public and private keys Private Key $input = "satoshinakamoto"; $sha256 = hash("sha256", ($input)); echo "<strong>Private Key: </strong&...
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2answers
345 views

Attacking Blochcain/Bitcoin by hash

Assuming that SHA-256 is not save anymore. How could the Bitcoin blockchain get attacked? Ok I could get the input value for the hash function but could I now easily add my own blocks to the chain? I'...
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1answer
545 views

BIP32 HD Wallets: HMAC vs. “just” Hashing the Seed

In A. Antonopoulus' Mastering Bitcoin (2nd edition) on page 106, there is a nice illustration showing how the basis for a BIP32 HD Wallet is generated: So here is the one thing I don't understand ...
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1answer
2k views

finding a fast way to calculate a nonce

I found a way for ultra-fast nonce calculation, based on my own method. Does it makes sense to introduce such method, or the complex way of nonce calculation has some advantages? Thanks!
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2answers
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What happens if I send a XRP transaction to a blank TAG when I was supposed to send to a specifc TAG?

I sent XRP to a blank TAG while I was supposed to send to the éxchange's TAG. The address is the one from the exchange but the TAG was left blank. The exchange says that they can't recover the money. ...
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1answer
857 views

What computations does Btcoin perform during mining? [duplicate]

Possible Duplicate: What exactly is Mining? What are the exact computations dies Bitcoin is performing during the mining? I understood that it has to do something with hashes and proof-of-work. ...
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1answer
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GPU Mining Speed

I am a bit new to the whole mining thing and just have a economical issue when it comes to selecting GPUs. Sorry if the title is in appropriate. Let's just say in mining Ethereum, a 1070 ti (costs $...
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1answer
2k views

Not getting enough Hashrate

I have an i3-3220 processor which i am using for mining. I know that you're supposed to use a GPU and all that. But currently i'm just trying it out before spending money. I'm using CPUMiner, mining ...
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3answers
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Why can't just any hash be used for a block? [duplicate]

disclaimer: I'm completely new at this, basic computer skills limited to GUI point-&-click I took a look at how difficulty was explained, that it is "increased" by requiring the SHA-256 ...
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GH/s is bigger than TH/s [duplicate]

How does BAIKAL X10 make more money than AntminerS9 although BAIKAL X10 Only 10 GH/s and Antminer S9 14 TH/s ? So, which one is bigger GH/s or TH/s? I am confused.

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