Google’s Quantum Technology Could Satiate Proof-of-Stake Detractors

Lucas Cacioli   Oct 24, 2019 03:25 2 Min Read

Google’s newly achieved ‘Quantum Supremacy’ computing technology has been marked for some surprising applications in the cryptocurrency space. According to one researcher on the project, the technology could enhance the proof-of-stake (PoS) algorithm.

Crypto Consensus Algorithms
In cryptocurrencies, there are two types of consensus algorithms that serve as governing protocols to achieve peer consensus on data values and block ownership on the blockchain—these are proof-of-work (PoW) and proof-of-stake (PoS).

PoW uses ‘mining’ where nodes must solve complex equations where the first one to reach the solution is awarded the cryptocurrency and block ownership. In PoS, the process is called ‘forging’, more of a random selection where a node’s chances of owning the next block are greatly boosted by the proportion of assets that they staked in the network. Both have been criticized as formulas to make the rich richer as chances are greatly improved in PoW based on the computation power you can afford and in PoS based on the stake you can afford to commit.

In order for the PoS variant process not to favor only the wealthiest nodes on the network, a random selection method is applied. The Randomized Block Selection method makes selections by looking for nodes with a combination of the lowest hash value and the highest stake. However, since the stakes are public, the next forger can usually be predicted by other nodes which has led many to question just how random the selection really is.

Quantum Enhancements to Random Selection   
So how can one be certain that the selections are truly random?
Scott Aaronson, a quantum theoretician at the University of Texas, who peer-reviewed Google's quantum supremacy paper, sees a possible answer to those questions in quantum computing.

On Oct. 23, Aaronson told Fortune that quantum computing could satisfy critics of PoS as Google’s quantum supremacy experiment could be adapted to generate certifiably random numbers.
Google’s original quantum supremacy experiment described to Fortune on September 20th, sampled randomly generated numbers produced through a specialized scenario involving ‘quantum phenomena.’ Aaronson believes that applying quantum phenomena to proof of stake will greatly enhance the fairness of the system and solicit its further adoption.



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