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Este texto descreve sobre o mundo fascinante das previsões de futebol no México, oferecendo insights, conselhos e estratégias para maximizar o conhecimento e potenciais ganhos em apostas esportivas. Ao combinar análise crítica com tecnologia avançada, você pode aproveitar ao máximo as previsões diárias das partidas do México. <|repo_name|>rhasselblad/rhasselblad.github.io<|file_sep|>/_posts/2021-12-16-proof-of-work-vs-proof-of-stake-vs-other-consensus-algorithms.md --- layout: post title: Proof of Work vs Proof of Stake vs Other Consensus Algorithms | Cryptonewsies image: /assets/images/blog/proof-of-work-vs-proof-of-stake-vs-other-consensus-algorithms.png tags: [Crypto News] --- Read our article "Proof of Work vs Proof of Stake vs Other Consensus Algorithms" to learn the differences between these consensus algorithms and how they affect the cryptocurrencies using them. Proof of work and proof of stake are two different methodologies used to achieve consensus within blockchain networks. Consensus protocol is a set of rules that enables all nodes in a decentralized network to agree on the state of the blockchain and validate the transactions that are replicated in the network. The decentralized nature of most of the cryptocurrencies eliminates the need for central authorities in order to validate or regulate transactions in the network. However, there are many possible ways cryptocurrencies can follow in order to validate transactions. In this article, we will cover the most prominent consensus algorithms, namely: **Proof of work** **Proof of stake** **Proof of authority** **Delegated proof of stake** **Proof of capacity** **Practical Byzantine Fault Tolerance** ## Proof of Work A Bitcoin miner selects transactions from the mempool and creates a block containing those transactions. They then compute a hash over the block’s contents to form its hash. The miner then needs to find the block nonce, which results in a hash that starts with enough zeroes to prove their work. The nonce is 64 bit by default, so there are 2^64 possible nonce values which the miner must search through to find one that satisfies the conditions. This system of using proof of work to validate transactions is also known as POW consensus algorithm.  Proof of work was designed by Satoshi Nakamoto when he initially proposed the Bitcoin and designed its protocol, back in 2008. In his original paper, Nakamoto proposed a consensus algorithm that was designed to eliminate the need for a trusted third party at the heart of the Bitcoin network. By introducing proof of work into the Bitcoin network, Satoshi Nakamoto gave users the ability to agree on the state of the network and make decisions about which transactions are valid without ever having to trust each other. The process will continue until one miner finds the answer they’re looking for and wins the block reward, which includes transaction fees and newly minted bitcoins. The first miner who finds a valid solution stops mining and broadcasts its block to the rest of the network. Miners who are still mining will simply continue mining on a new block. The proof of work is what makes Bitcoin so resistant to attacks and ensures its security. It reduces the possibility of double-spending and ensures that all transactions are valid. How does proof of work affect miners? Because cryptocurrency mining involves solving complex mathematical problems, it requires specialized computers that consume large amounts of electricity and computing power. This means that there is an incentive for miners who run these types of machines to keep doing it for as long as possible because they earn money from doing so. ## Proof of Stake In proof-of-stake (pos), validators use their own coins as a stake in the network. When they validate blocks on the blockchain, they receive transaction fees as rewards for their work. Proof-of-stake is a type of consensus algorithm where validators use their own coins as collateral for participating in the network. The stakers are chosen to validate blocks based on the amount they have staked and how long they have staked their coins for. Proof-of-stake is an alternative to proof-of-work (pow) consensus algorithm, where instead of relying on miners to mine blocks using electricity and computers, validators are rewarded with transaction fees when they validate blocks. Proof-of-stake is seen as a more environmentally friendly alternative because it requires less energy consumption than proof-of-work. It also reduces the risk of centralization because anyone who holds enough coins can become a validator. The first proof-of-stake blockchain was Peercoin, which was introduced in 2012 and combines proof-of-work with proof-of-stake.  In 2015 Ethereum proposed its own version of proof-of-stake called Casper and planned to implement it fully when Ethereum 2.0 was released. Cardano is another example of a proof-of-stake blockchain. It uses a system called Ouroboros and was introduced in 2017. ## Proof of Authority Proof of authority is another type of consensus algorithm that aims to solve some of the problems related to decentralized blockchains like Bitcoin and Ethereum. It is an alternative to proof-of-work and uses different methods for validating blocks on decentralized blockchains. Proof of authority is an alternative to proof-of-work consesus algorithm, where instead of relying on miners to mine blocks using electricity and computers, validators are rewarded with transaction fees when they validate blocks. Proof-of-authority is seen as more secure than proof-of-stake because validators cannot be removed from their positions unless they are caught cheating or going against protocol rules which would be very difficult for any outsider who doesn’t have access to the private keys associated with their account. Proof of authority is often used for private blockchains where only authorized users can participate in validating blocks on a network. These blockchains are often used by companies who want to keep their data secure but still want it available to trusted parties only. The main advantage of proof-of-authority is that it enables fast transaction confirmation times because it doesn’t require mining with complex cryptographic puzzles like proof-of-work does. ## Delegated Proof of Stake Delegated PoS is a type of consensus algorithm where a group known as delegates or elected representatives validate blocks for other nodes. The goal behind delegating these responsibilities away from all nodes in order to increase efficiency is because having every node do everything would result in inefficiencies due to low participation rates (e.g., some nodes may not be active). In delegating proof-of-stake, stakeholders delegate the right to validate blocks to delegates. The delegates can be elected based on their reputation or voted by stakers. Delegated proof-of-stake is often used in blockchains where trustless voting is needed, as it allows stakeholders to delegate their voting rights to someone they trust without having to trust them themselves. In this type of consensus algorithm, users can become delegates and earn rewards if their node is chosen as one of those which will create blocks on behalf of other nodes in the network. ## Proof of Capacity Proof of capacity (PoC) is a consensus algorithm that enables participants in a network to independently prove their capacity by contributing disk space in order to win block rewards. PoC requires nodes to store specific cryptographic puzzles on their hard drives rather than having them run through intensive computations like with POW or POS systems. It’s also called proof-of-storage or proof-of-disk-space because it requires participants to prove they have enough disk space available by using it as collateral for mining new coins or validating new transactions on the blockchain network instead of performing complex cryptographic calculations like POW or POS systems do. The amount of space required depends on how many people want access at any given time as well as how much time each user wants access for (for example: one day vs one year). ## Practical Byzantine Fault Tolerance Practical Byzantine Fault Tolerance (PBFT) is a consensus algorithm formulated by Miguel Castro and Barbara Liskov in 1999. It’s designed specifically for asynchronous systems with potentially malicious Byzantine nodes and is used by Hyperledger Fabric as well as other permissioned blockchains. PBFT requires additional computational overhead compared to other consensus protocols like PoW/PoS since it relies on message passing between nodes rather than cryptographic puzzles like POW or POS systems do; however, PBFT provides high-security guarantees while still being highly scalable compared to other systems like Ethereum’s PoW/PoS hybrid model where validation is done by miners rather than nodes themselves (or at least some subset thereof). ## Conclusion Consensus algorithms are essential for the functioning of cryptocurrencies. They ensure that all participants in a network agree on the same version of events and prevent double-spending. Different consensus algorithms have their own advantages and disadvantages that must be considered when choosing one for your project. Consensus algorithms vary in their speed, energy efficiency, security and scalability.<|repo_name|>rhasselblad/rhasselblad.github.io<|file_sep|>/_posts/2022-01-31-how-to-get-started-with-cloud-computing.md --- layout: post title: How to Get Started With Cloud Computing | Cryptonewsies image: /assets/images/blog/how-to-get-started-with-cloud-computing.jpg tags: [Tech News] --- In this article, we will look at how you can get started with cloud computing and what skills you will need along with some examples of