Proof of Work (PoW)

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This article will cover and explain the differences between a few forms of cryptocurrency consensus, namely Proof of Work, Proof of Stake, and Delegated Proof of Stake. Cryptographic consensus schemes like these are at the heart of almost all decentralized cryptocurrencies from Bitcoin to Bitshares to even Steem. This guide is made to be written in common crypto language—not too hard for someone who hasn't seen these concepts before, and easy to understand for those that are somewhat familiar with cryptocurrency.

The main goal of PoW is to deter denial-of-service attacks DDOS by requiring bitcoin pool mpos meaning work to be done before block submission. Let's go over how Bitcoin uses Proof of Work for its mining purposes, but before that, let's define a few terms. Hashing means to take some value or string of characters and put it through a program that gives an entirely different string of characters, in a pseudo-random unpredictable way.

Bitcoin uses the SHA Algorithmwhich is one of many hashing programs that can hash like that. For example, the SHA hash of the word "apple" is 3a7bd3ea3d29eeafcfb7e44cdc42d1cb6bdd4f1b yet the SHA hash of "applf" incrementing the 'e' to an bitcoin pool mpos meaning is. These strings look super bitcoin pool mpos meaning, and that's intended—there's no quick or easy way to go from the first to the second. When Bitcoin miners mine blocks, they pick a number of transactions in the "mempool" a list of the transaction requests they received from Bitcoin users, and put them together in a block.

After setting the block up, they add a number bitcoin pool mpos meaning the end of the block, called a nonce. Then, they put the entire block with the nonce through the SHA algorithm, giving them a random string like we saw above.

Bitcoin requires the string to start with a set number of zeroes, that changes based on the computational power of miners. Let's say that number is When the miner hashes the block, the miner checks the hash to see if it starts with twenty zeroes.

If it doesn't, he changes the nonce the number at the end and hashes again, and again, until it does start with twenty zeroes. You can see how mining the block took a lot of work — the miner had to keep on trying different nonces until they got the one right.

This took a lot of processing power, computational energy, and more. Another important goal of PoW is to protect against double spending. What prevents Bitcoin user Alice from getting her transaction "Alice sends 2 BTC to Bob" put in the blockchain again and again and again?

PoW protects the Bitcoin network bitcoin pool mpos meaning DDOS attacks, because in order to mine a block you need a sufficient amount of processing power, and in order to monopolize Bitcoin mining, you need control of a majority of the computational power of all Bitcoin miners, which is infeasible and generally impossible. Thus, it's infeasible for Alice to have the computational power to "double spend" her money, and the network is well-protected.

Proof of Stake PoS is another consensus structure, like PoW, but instead of requiring work or computational power, it requires the miner to hold a large amount of the cryptocurrency. Proof of Stake aims to prevent attacks by having high requirements for such an attack like PoW and by lowering incentives dramatically.

Also, his incentive to attack is very low, since if he does attack SPC he would suffer dramatically from his own attack because he owns so many SPC. Some people, like Ethereum supporters, think Proof of Stake is more efficient and fair compared to Proof of Work for reasons such as the above. Additionally, anyone could become a PoS miner technically given they had some amount of the coin, however getting into Bitcoin mining generally requires expensive hardware and commitment.

Delegated Proof of Stake DPoS is a newer consensus structure, and is actually behind many cryptocurrencies including Steem. It's somewhat similar to PoS but has different and more "democratic" features that some say make it more efficient and fair. Lots of variables within the network such as transaction sizes and fees are controlled by this witness panel.

The witness panel also deterministically selects witnesses to "witness" or confirm blocks. Clearly, the network and users place bitcoin pool mpos meaning lot of trust in these elected witnesses to give them such powers, yet if they misbehave, they can easily be voted out of the "witness panel," so there is really no incentive for them to misbehave or upset their voters.

To add in the "proof of stake" part of DPoS, stakeholders have influence proportional to their stake in the system. DPoS is found to be more decentralized than other consensus systems because the threshold to enter is very low. DPoS bitcoin pool mpos meaning been shown to help maintain decentralization, fend off regulatory interference, and has made cryptos like Steem into world players. In conclusion, these three consensus systems are at the bitcoin pool mpos meaning of bitcoin pool mpos meaning cryptos and exist to keep cryptocurrencies decentralized, hard to attack, and secure.

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Cheers and speak very soon again. Este Post ha recibido un Upvote desde la cuenta del King: This Post has been Upvote from the King's Account: This post has been upvoted from the communal account, minnowsupportby bob-kremton from the Minnow Support Project.

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Check out the other content resteemed by resteembot. Some of it is bitcoin pool mpos meaning cool! Thank you for this informative post.

I have been reading into these and their differences. You make it clear and easy to understand. For example, the SHA hash of the word "apple" is 3a7bd3ea3d29eeafcfb7e44cdc42d1cb6bdd4f1b yet the SHA hash of "applf" incrementing the 'e' to an 'f' is aafe5e5c8dddda7edeb73be96b0db1d7bba3b74fd6f. Proof of Stake Proof of Stake PoS is another consensus structure, like PoW, but instead of requiring work or computational power, it requires the miner to hold a large amount of the cryptocurrency.

Thanks for reading, — mooncryption image sources: Authors get paid when people like you upvote their post. Thank you so much for the resteem: You have completed some achievement on Steemit and have been rewarded with new badge s: Award for the number of upvotes received Click on any badge to view your own Board bitcoin pool mpos meaning Honor on SteemitBoard. For more information about SteemitBoard, click here If you bitcoin pool mpos meaning longer want to receive notifications, reply to this comment with the word STOP By upvoting this notification, you can help all Steemit users.

Shame they dont have any SP! Your post was mentioned in the hit parade in the following category: Upvotes - Ranked 4 with upvotes.

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