Bitcoin, the pioneering cryptocurrency, relies on a specific consensus algorithm to validate transactions and maintain the integrity of its blockchain. This algorithm is known as Proof-of-Work (PoW).
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Understanding Proof-of-Work
In essence, PoW is a resource-intensive mechanism where miners compete to solve complex cryptographic puzzles. The first miner to solve the puzzle gets to add the next block of transactions to the blockchain and is rewarded with newly minted Bitcoins.
Why Proof-of-Work?
PoW addresses the ‘double-spending’ problem inherent in digital currencies. Without a central authority, it ensures that the same Bitcoin cannot be spent twice. The computational effort required to solve the puzzles makes it extremely difficult for malicious actors to manipulate the blockchain.
Limitations
While effective, PoW has limitations. It consumes significant amounts of energy, raising environmental concerns. It also faces challenges regarding throughput (transactions per second) and latency.
Other consensus algorithms exist, but PoW remains central to Bitcoin’s security and functionality.
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