Proof of work vs proof of stake

What proof of work and proof of stake are

Proof of work and proof of stake are two different ways for a blockchain network to confirm which transactions are real and which order they should be in. With proof of work (PoW), people called miners compete to solve extremely difficult mathematical problems, this takes a lot of computer power and energy. In proof of stake (PoS), participants called validators commit some of their own coins as a kind of security deposit, known as staking, and then the system picks who gets to create or verify new blocks based on rules built into the protocol.

Bitcoin has always used proof of work. Then, in September 2022, Ethereum changed from proof of work to proof of stake in a major update many call The Merge.

How each method keeps the network secure

For proof of work, the foundation of security is expense. To successfully rewrite transaction history, someone would need enough computing equipment and electricity to outpace everyone else in the network, which would cost a tremendous amount both to buy and to keep running. In proof of stake, security is tied directly to the value of the coins a validator has staked, a validator who cheats risks seeing some or all of their staked coins taken away through a process called slashing.

Proof of work systems draw a lot of attention for their electricity consumption; they need huge amounts of energy to operate, by design. Proof of stake networks use much less energy. Some people argue proof of stake gives larger coin holders too much power, which is its own kind of systemic risk. The question of which method is safer or better is far from settled.

What the two models mean for coin holders

Both systems give rewards to those who participate. Miners on proof of work networks receive new coins and some portion of transaction fees for every block they add. That amount drops on a schedule, see bitcoin halving. Validators on proof of stake networks receive rewards and fees for locking up coins and taking part in block checks. Here’s what this often means in real life:

• With proof of work, you need mining equipment and a reliable way to cover energy costs. Most people use a mining pool to combine resources and share out rewards.
• With proof of stake, you need to stake coins, which could mean using your own wallet, putting them into an exchange’s program, or handing staking rights to someone else through a delegation system.

None of these payouts are promised. They depend on the rules of each network and what everyone else is doing. Always read up on crypto staking before putting coins into a proof-of-stake network. Your rewards can go up or down, and since crypto prices move fast, it’s possible to lose money even if you earn new coins.

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