Consensis mechanisms in cryptocurrency: work evidence (Pow) and Stake (POS)
Cryptocurrencies such as Bitcoin, Ethereum and others are digital or virtual currencies that use cryptography for security and decentralized control. In order to maintain the integrity of these cryptocurrencies, a consensus mechanism is necessary to validate transactions and ensure that all participants agree to the blockchain status.
In this article we will deepen two of the most common consensus mechanisms that are used in cryptocurrency: proof of work (Pow) and the evidence of the pile (POS).
Proof of work (pow)
Evidence for the work is one of the earliest and most useful consensus salgorithms. It was first introduced in 2008 by Satoshi Nakamoto as a solution for the difficulty problem in Bitcoin mining process.
This is how Pow works:
- The miners compete : The miners compete for complex mathematical puzzles that require a significant calculation performance.
- Loosen the puzzle : The miner who first loosens the puzzle can add new blockchain blocks and transmit them in the network.
- Validation : The validators (miners) who have solved the puzzle have a greater chance of creating new blocks, which they then transmit in the network.
- Energy consumption : Loosening Pow puzzles requires a significant calculation performance that can lead to high energy consumption and environmental deterioration.
Example: Mining Bitcoin
To illustrate how Pow works to take an example into account:
- Loosen of a puzzle : A miner solves a complex mathematical puzzle that requires 100 million calculation cycles.
- rewarding reward
: Miner creates new transaction blocks and transferred them to the network.
- Energy consumption : The miner spent about 10 minutes of electricity to solve the puzzle.
Proof of the pile (pos)
The proof of the use is a consensus salgorithm that was introduced in 2014 by Satoshi Nakamoto as an alternative to Pow. It is designed in such a way that it is more energy and more ecological.
This is how POS works:
- Interested parties assume : Anyone who has or has a certain cryptocurrency can keep their coins.
- The validators are selected : A group of validators (interested parties) is frequently selected from the owner group.
- The operations are burned : Validators with higher operations have more chances of creating new blocks, which they then transmit in the network.
- Energy consumption : Creating a new block in POS requires less calculation performance compared to Pow.
Example: gas -based validation of Ethereum
To illustrate how POS works on Ethereum, we should consider an example:
- Insoles and validation : Everyone has or has a certain amount of Ethereum can keep their coins.
- The validators are selected : A group of validators (interested parties) is frequently selected from the owner group.
- Gas validation : The validator with the highest gas limit for creating new blocks can create a new block.
- Energy consumption : Creating a new block in POS requires less calculation performance compared to Pow.
Diploma
In summary, it can be said that both the detection of the work (Pow) and the proof of the pile (POS) are consensus mechanisms that are often used in cryptocurrency. While Pow was the first solution introduced by Satoshi Nakamoto in 2008, POS gained as an alternative to popularity due to the potential energy efficiency and environmental supply.
However, it is important to note that both algorithms have their limits and weaknesses. For example, Pow is susceptible to the exploitation of ASIC (application -specific circuit), while POS can be susceptible to 51% attacks if a single entity controls more than half of the participation.
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