Questions tagged [proof-of-work]

A proof-of-work (POW) system is an economic measure to deter denial of service attacks and other service abuses such as spam on a network by requiring some work from the service requester, usually meaning processing time by a computer.

14 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
3
votes
0answers
367 views

What's the difference between Nakamoto consensus vs Proof-of-Authority vs BFT

Documentations all around the internet are filled with these terms to categorise consensus protocols. What is the difference between them. For example: many call parity's tendermint as a BFT type ...
3
votes
0answers
309 views

What is the category of the 2 consensus algorithms here presented?

From the Ethereum Wiki: In a private chain context, there are three consensus algorithms that make the most sense: Proof of authority - essentially, one client with one particular private key ...
3
votes
0answers
166 views

general mathematical description of Pow algorithms

Is it possible to consider a chain of blocks as an acyclic graph, where to add the next block (or node, if we are thinking about the blockchain as a graph), it is necessary to solve a computationally ...
2
votes
0answers
50 views

How to make atomic swap between Ethereum and POS chain?

There's simple way to make atomic swap for smart-contact chain and any POW chain. For example for Ether <> BTC: Alice sends some Ether to the swap smart-contact which locks this money. While ...
2
votes
0answers
3k views

Does Ethereum has halving or anything equivalent?

Bitcoin has a halving which will likely happen around June 2020. Is there anything similar for Ethereum? If not, why?
2
votes
0answers
1k views

How does Ethhash compare to mining algorithms used in other blockchains?

When it comes to mining, I'm more or less aware of how Bitcoin's simple SHA256 mining works, how Litecoin & similar attempted (and failed) to introduce ASIC-resistance with Scrypt, and how ...
2
votes
0answers
176 views

Public-of-chain using proof-of-authority, where authority is defined as the amount of work on your public key

I'm wondering if there would be benefits to create a public blockchain based on the same algorithms used for private, proof-of-authority blockchain, except replacing the concept of authority by the ...
1
vote
0answers
188 views

How nonce is calculated EthHash POW?

So I get that Ethereum POW is different from Bitcoins POW, I dont get the calculation of nonce from the pseudo random nodes from the data set to serve as POW, can somebody elaborate on this ?
1
vote
0answers
98 views

Does every node execute contracts in Proof of Stake? If yes, why?

In Ethereum, for Proof of Work this sentence is true: "Every single operation that is executed inside the EVM is actually simultaneously executed by every node in the network. This is why gas exists" ...
0
votes
0answers
32 views

Problems trying to implement Nexus (NXS) Skein-Keccak (SK1024) in Golang

) I know this might not be the perfect place to ask, but as ETH is also a Blockchain Tech and also uses Go within their stack, I couldn't find a forum that seems more appropriate. My Problem: I'm ...
0
votes
0answers
27 views

Relationship between fault tolerance and network latency

I'm currently studying Ethereum's PoS and a sentence on the relationship between fault tolerance and network delays caught my attention in the Proof of Stake FAQ. Quoting Vitalik: In this model, ...
0
votes
0answers
22 views

How feasible it to combine Proof of Work and Proof of Elapsed time consensus to create a custom blockchain?

I wonder if it feasible to create your own custom consensus by combining Proof of Work and Proof of Elapsed time? How would I approach it? Any tools or frameworks to build it? I appreciate all the ...
0
votes
1answer
31 views

Leverage short positions in decentralised PoW currencies

Hint I asked this question in a similar style already on bitcointalk and on bitcoin.stackexchange. But in these threads, there are no good answers and I thought maybe it would be better to ask the ...
-1
votes
1answer
39 views

Proof Of work (with real world example needed)

I have understood the sha256 algorithm example . But how does a node in a network decide if a transaction is valid or not .