Proof-of-work (PoW) is a consensus algorithm that is widely used in blockchain technology to secure the network, validate transactions, and prevent malicious actors from taking control of the network.
The concept of PoW was first introduced in the context of cryptocurrencies, such as Bitcoin, but has since been adapted for use in other blockchain applications.
In a PoW system, network participants compete to solve complex mathematical problems that require a significant amount of computational effort. The first participant to solve the problem and provide the correct answer is rewarded with a certain amount of tokens or coins.
The solution to the problem becomes part of the next block in the blockchain, which acts as a secure record of all transactions.
PoW systems ensure the security of the network by making it difficult for malicious actors to take control of the network.
Since the solutions to the mathematical problems require significant computational power, it is difficult for an attacker to manipulate the system. Additionally, the solutions are verified by other network participants, further strengthening the security of the network.