A Green Cryptocurrency
Bitcoin has been creating a lot of buzz lately as more and more people invest in the cryptocurrency. But, behind all this success is a blockchain that's sustained by miners who, as it turns out, actually use massive amounts of electricity for each transaction. Bitcoin are mined using the computing power of hundreds of CPUs all over the world, with each one eating up electricity to continuously verify transactions within the Bitcoin blockchain.
But...is there's a way to cut out the energy used in blockchain transactions?
Enter BitTorrent inventor Bram Cohen who just started the new company Chia, which he describes in an interview with TechCrunch as "a better bitcoin." Instead of depending on what's called a "proof of work" to verify its blockchain, Chia will launch a cryptocurrency that is based on proof of time and storage. This means that Chia will depend on already existing, unused storage space in hard drives.
Farming Not Mining
The proof of work model, according to Cohen, is also prone to instability, because the few bitcoin miners with access to cheap electricity actually end up having an outsized influence. “The idea is to make a better bitcoin, to fix the centralization problems," Cohen told TechCrunch. In this sense, Chia becomes an even more decentralized blockchain.
Chia, instead of using proof of work, solves security concerns in proof of space by supplementing its blockchain verification with proofs of time. In short, in the model that Cohen proposes in Chia — which they refer to as farming instead of mining — the same level of security can be achieved while using less electricity.