COMPARISON OF Proof of Capacity and Proof of Stake

by qitchain

We often show the supremacy of Proof of Capacity (PoC) over Proof-of-Work (PoW). The latter considers as the most widely used consensus algorithm and has certain parallels with PoC.

Another protocol, Proof-of-Stake (PoS) considers a viable alternative to PoW.

With PoS, the developer of a new block is selected in a deterministic manner, based on the resources of the block, also known as stake.

The energy demand dilemma of PoW resolves by eliminating the need for energy-intensive hardware. It does, however, introduce new issues to the table.

The aim of this article is to show how PoC has all of the benefits of PoW and PoS without the drawbacks.

Proof of Capacity in Cryptocurrency

Proof of Capacity (PoC) is a fault-tolerant system that permits nodes (mining devices) to utilize the vacant space of the hard drive in order to mine cryptocurrencies and validate transactions.

It works as a holy grail as it does not require high energy consumption; it is feasible, efficient, and cheaper than proof of Stake and Proof of Work systems.

PoW system requires a great amount of work for block verification whereas PoC simply does ‘plotting’. The results attain after the process help in block verification.

This process ensures the utilization of hard drives and storage space where a party dedicates a specific portion of storage spaces to the particular objective.

Generation of blocks and authentication of transactions disperse in PoC; where the archive and consensus decentralize the network.

In a PoC system QITCOIN MINING can start with a simple laptop and an external HDD instead of using costly GPUs or ASIC rigs. The amount of work is directly related to the amount of free space available in the disk for the plotting process.

Miners in PoC with the aim of taking part in transaction verification; plot the hard drives which means that they shall store the solutions.

These solutions are very intricated that it is difficult to resolve them in real-time. Some solutions are quicker that if the hard drive has the quickest elucidation to the latest block problem, it wins the block.

It is a new algorithm that is a kind of solution to the old Proof of Work system; only Busrtcoin Cryptocurrency has adapted it recently.

The intention of this advanced (PoC) mining system is to solve complicated hash tasks; it attempts to provide a solution to the hashing of PoW and holds the higher possibility of conquering the mining conflict.

Four minutes process takes place in PoC to produce block whereas PoW requires 10 minutes to complete the process.

After reading the stored plot files, this program submits the best-calculated results. Miner undertakes an intensive calculation procedure if they incline to expand the plotted capacity

While counting the advantages of PoC we see that it is environmentally sustainable because it saves the calculations whereas others like PoW thrust aside the old calculations in order to make a new one.

Thus, we can say that the Proof of Capacity Cryptocurrency is friendly and economical as it is less energy-intensive and many people consider this a more viable substitute for the present mining methods.

Still, we know that time will prove the efficiency of Proof of Capacity; soon it will become the latest standard of the algorithm.

How PoC works: Plotting and Mining

The Proof-of-capacity mechanism is a two-step process; plotting and mining.


Let’s discuss the first step of plotting; we start with the plotting of the hard drive which creates a list of all possible nonce values by giving multiple repetition circles to hash data; this data also includes the account ID of the miner.

There are 8192 hashes from each nonce value in the list which sequence from 0 to 8191.

Scoops, a pair that combines the two adjacent items. They are made within the hashes; all those hashes which are adjacent to one another are paired in duplet.

To understand, just consider hash 1 and hash 2 are adjacent, so they make scoop 1. Likewise, hash 2 and hash 3 are adjacents creating scoop 1. This goes out till the end.


After the completion of the plotting process, next is the mining exercise – the most vital part of the whole protocol. This step really constitutes the original mining.

Miner calculates a scoop number. Let’s suppose, the miner made scoops and start mining activity which produces scoop no 36; they then must go to scoop number 36 which is constituted over nonce 1.

The scoop data of 36 would then use to measure the deadline value.

This deadline value shall measure and compare to other deadline values of all nonce values.

The process of calculating scoop numbers, checking the nonce values, and formulating the deadline is repeated for each nonce value.

This calculation performs on each nonce value on the hard drive of the miner.

When the miner visits in drive the repeated and every nonce value, then they calculate the deadline against it.

They choose a deadline with the least value; this provides an optimal value to be used in the further process.

Now, let’s talk briefly about what is a deadline?

The deadline value displays the time (in seconds) from the time when the last block modifies till the time a miner will allow to start forging the next block. So, it is the duration of two states of the miner to manipulate two blocks.

In this time, if no one did change or forge the block; this becomes the opportunity for the miners to forge it and claim about reward against that forge activity.

The process of reward is quite straight and stringent.

For instance; if there is a miner A, and he generates the minimum deadline of 30 seconds and if another miner would alter the block in the next 30 seconds; miner A will be successful in securing the opportunity to hammer out the next block.

Thus, for his successful effort, he would get the reward. That’s how users take rewards through mining in cryptocurrency and this is how PoC works through plotting and mining.

Centralization is being phased out in favour of decentralisation

The greatest disadvantage of PoS is the lack of centralization. The most powerful driving force behind cryptocurrencies, as well as their most innovative feature, is decentralization. A PoS scheme creates two issues: initial allocation and mining payout.

Initial coin delivery in a PoS scheme occurs by ICOs, crowd purchases, airdrops, and other related methods. As a consequence, delivery takes place in a limited time.

At the star,t a small group of people concentrates the possession of coins. Furthermore, with PoS, those with on coins get more coins. This self-reinforcing mechanism fosters disparity in the monetary distribution system.

Mining distributes coins to miners over a long period of time in a PoC scheme.

As compared to the advanced hardware used to mine PoW cryptocurrencies, anybody can mine because it just takes a computer and free HDD room.

The entrance barriers are very poor. In a proof-of-concept scheme, miners get compensation equally based on the amount of disc space they use.

Utilization of energy

PoS got credit for using few resources in comparison to Proof-of-Work. Proof-of-Capacity, on the other hand, has the same energy-saving benefit as PoS. In fact, PoS still necessitates the use of a computer with a hard drive.

As miners often have several HDDs, mining with PoC absorbs slightly more energy. The distinction is minimal, and the trade-off is that PoC is more decentralized and, potentially, more stable.

Resistance Of attacks

A 51 percent attack on a blockchain occurs when a group of miners controls more than half of the network’s mining hash rate or processing capacity. They’d be able to exploit transfers to their advantage.

If a person acquires 51 percent of the total currency supply in a Proof-of-Stake scheme, there is no way to take it away from them – barring any kind of supernatural developer interference.

Your universe is constrained by the number of resources available to you.

If you have a significant/majority stake in a business, a little more can happen.

On the other hand, if anyone launched a 51 percent attack on Bitcoin or Burst, there is still the option of adding additional hardware to neutralize the offender, which is theoretically limitless.

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