The Advantages and Disadvantages of Proof of Work vs Proof of Stake
What’s the difference between proof of work and proof of stake? How do they
compare? Which one is better? Well, we don’t have all the answers, but this
article will help you understand the differences between these two methods for
reaching consensus in a cryptocurrency network, along with their relative
strengths and weaknesses. Let’s get started!
What is proof of stake?
The proof-of-stake is a type of algorithm that helps solve the challenges of
distributing public blockchains. The first cryptocurrency to use the
proof-of-stake was Peercoin in 2012. Proof-of-stake is an idea originating from
the observation that most cryptocurrencies rely on proof-of-work, which can be
tedious. A different consensus protocol has been developed, which is commonly
referred to as proof-of-stake. Proof-of-stake creates blocks in a deterministic
way depending on their wealth, hence minimizing power use. To give a concrete
example, imagine someone who chose the person who made the biggest contribution
to securing the network as a miner. This means wealth is referring to the coins
locked in a special type of node, called stake nodes. Instead of mining new
blocks as normal miners do, they simply participate in helping the blockchain
keep an accurate account of the ledger, receiving payoffs of new coins every so
The Benefits Of Proof Of Work
Here are the benefits of Proof Of Work:-
- The algorithm is easy to understand, which makes it easier for new users to
- Users are incentivized to contribute to the security of the network through
a process known as mining, which creates a feedback loop that provides security
for Bitcoin in a distributed manner.
- Unlike other cryptocurrencies, Bitcoin doesn’t require a lot of power or
bandwidth, so miners can mine without worrying about electricity costs.
- Miners are not geographically restricted because they can be run from
anywhere with internet access and CPU capacity (however, they do need a wallet).
- Mining is an incentive for people to take part in the processing of
transactions on the blockchain, and they are rewarded with newly created
- Mining prevents denial-of-service attacks because there’s no way someone
could flood all nodes on the network with enough requests to disrupt the normal
operation, making it expensive to attack the blockchain.
- Due to bitcoin’s design, there will be less than 21 million coins, which
makes the currency more valuable.
- Miners overclocking is hard because the algorithm automatically adjusts the
difficulty to ensure that blocks are mined at a rate of one every 10 minutes
(unless bitcoins have been lost or stolen).
- Mining prevents people from transacting bitcoins that don’t exist because
all bitcoin transactions are recorded on a public ledger (making it impossible
for someone to spend other people’s coins).
- Bitcoin miners don’t have a centralized authority because they have to race
against each other to find the next block in the chain, so it’s very difficult
for one person to falsify records without getting caught.
The Benefits Of Proof Of Stake
- t to censorship, because not only does it depend on nodes being online to
confirm transactions, but every user can be an active part of the PoS, which
means they can switch between being online and offline at any time, while still
having their private keys.
- If you want your blockchain to process more transactions per second than
what PoS allows you and remain decentralized, you will need to use something
like sharding or side chains, which would restore the benefits of Proof Of
- Proof-of-Stake is much more environmentally friendly than Proof-of-Work.
There’s no need for costly, specialized hardware that consumes vast amounts of
power to mine PoS coins.
- Proof-of-Stake doesn’t require any additional cost in purchasing expensive
equipment or additional electricity which means that it can be obtained by
everyone who has a computer.
- Proof of stake also has a lot less volatility because there isn’t a chance
of miners acquiring 51% control over the system. In proof of work mining, if one
miner was able to accumulate 51% of all the hashing power they could essentially
cause havoc on the system with what’s called a 51% attack.
- PoS transactions confirm faster on average because each stakeholder only
needs to sign off on their transaction instead of needing approval from other
miners for transactions to take place.
- PoS does not suffer from problems like double spending since every validator
gets rewarded for creating blocks rather than just miners.
- In a PoS system like Ethereum, the consensus among validators will be
maintained even when nodes go offline for a period specified by the block time.
- It is also much more cost-effective because there is no need to purchase
expensive equipment. PoS is free since there are no extra costs.
- It is much more resistant in two different layers or a centralized service
running parallel to the blockchain.
Things To Consider Before Choosing A Blockchain Network
In bitcoin and other cryptocurrencies like Ethereum, proof-of-work (PoW)
involves miners verifying transactions. Their efforts are rewarded with coins.
PoW is disadvantageous because it consumes a lot of energy, is hard to scale,
and rewards participants with more computing power over those with the most
accurate information about past transactions. By limiting blocks mined per day
or month, one can limit the amount of computing power that can be used for
mining each day or month.
Proof of Work is an excellent way for cryptocurrency miners to make a living by
solving equations, which are needed to create a decentralized digital currency.
PoW prevents fraud, but only by recording all transactions on the blockchain.
Consequently, Proof-of-Work (PoW) mining is highly energy and resource
intensive, which has caused developers to develop alternative consensus models
such as proof-of-stake (PoS). Newer models use fewer resources but still possess
the same degree of security that PoW does.