https://preview.redd.it/dju4oz1g16c51.jpg?width=2400&format=pjpg&auto=webp&s=fe57edcd81ffa31bff95fe3026055020f7720dcesubmitted by Blockchain_org to BlockchainStartups [link] [comments]
Cryptocurrencies have now become a buzz word. Despite the resilience that it faced initially, cryptocurrencies have come a long way. There are a total of around 5000 cryptocurrencies circulating in the market. If you plan to make a career in this domain, you need to run through the following questions.
1. What is a cryptocurrency?
Cryptocurrency is a digital currency that is transacted on a distributed ledger platform or decentralized platform or Blockchain. Any third party does not govern it, and the transaction takes place between peer-to-peer.
2. When was the first Cryptocurrency introduced?
The first Cryptocurrency or Bitcoin was introduced in the year 2009.
3. Who created Cryptocurrency?
Satoshi Nakamoto gave the first Cryptocurrency. The white paper for the same was given in 2008 and a computer program in 2009.
4. What are the top three cryptocurrencies?
The following are the three cryptocurrencies:
• Bitcoin (BTC) $128bn.
• Ethereum (ETH) $19.4bn.
• XRP (XRP) $8.22bn.
5. Where can you store Cryptocurrency?
Cryptocurrencies are stored in a digital wallet, and this is accessible via public and private keys. A public key is the address of your wallet, and the private key is the one that helps you in executing the transaction.
6. Which is the safest wallet for Cryptocurrency?
The most secured wallet for Cryptocurrency is a hardware wallet. It is not connected to the internet, and thus it is free from a hacking attack. It is also known as a cold wallet.
7. From where I can purchase cryptocurrencies?
The easiest way to buy Cryptocurrency is via crypto exchange. You can several crypto exchanges like Coinbase, Bitbuy, CHANGENow, Kraken etc.
8. What are the ten popular crypto exchanges?
The following are the best ten popular crypto exchange:
We all know that Bitcoin or any other cryptocurrency runs on the Blockchain platform, which gives it some additional features like decentralization, transparency, faster speed, immutability and anonymity.
10. What is AltCoin?
It means Alternative Coin. All the cryptocurrencies other than Bitcoin are alternative coins. Similar to Bitcoin, AltCoins are not regulated by any bank. The market governs them.
11. Are cryptocurrency sites regulated?
Most cryptocurrency websites are not regulated.
12. How are Cryptocurrency and Blockchain related?
Blockchain platform aids cryptocurrency transactions, which makes use of authentication and encryption techniques. Cryptography enables technology for Cryptocurrency, thus ensuring secure transactions.
13. What is a nonce?
The mining process works on the pattern of validating transactions by solving a mathematical puzzle called proof-of-work. The latter determine a number or nonce along with a cryptographic hash algorithm to produce a hash value lower than a predefined target. The nonce is a random value used to vary the value of hash so that the final hash value meets the hash conditions.
14. How is Cryptocurrency different from other forms of payment?
Cryptocurrency runs on Blockchain technology, which gives it an advantage of immutability, cryptography, and decentralization. All the payments are recorded on the DLT, which is accessible from any part of the world. Moreover, it keeps the identity of the user anonymous.
15. Which is the best Cryptocurrency?
Several cryptocurrencies have surged into the market, and you can choose any of these. The best way to choose the right cryptocurrencies is to look at its market value and assess its performance. Some of the prominent choices are Bitcoin, Ethereum, Litecoin, XRP etc.
16. What is the worst thing that can happen while using Cryptocurrency?
One of the worst things could be you losing your private keys. These are the passwords that secure your wallet, and once they are lost, you cannot recover them.
17. What is the private key and public key?
Keys secure your cryptocurrency wallet; these are public key and private key. The public key is known to all, like your bank account number, on the hand, the private key is the password which protects your wallet and is only known to you.
18. How much should one invest in Cryptocurrency?
Well, investing in Cryptocurrency is a matter of choice. You can study how the market is performing, and based on the best performing cryptocurrency, you can choose to invest. If you are new to this, then it’s advisable that you must start small.
19. From where can one buy Bitcoin using Fiat currency?
Two of the popular choices that you have are Coinbase and Binance, where you can purchase Cryptocurrency using fiat currency.
20. Are the coins safe on exchanges?
All the exchanges have a high level of security. Besides, these are regularly updated to meet the security requirements, but it’s not advisable to leave your coins on them since they are prone to attack. Instead, you can choose a hard wallet to store your cryptocurrencies, which are considered the safest.
21. What determines the price of cryptocurrencies?
The price of cryptocurrencies is determined by the demand and supply in the market. Besides, how the market is performing also determines the price of cryptocurrencies.
22. What are some of the prominent cryptocurrencies terminologies?
There are jargons which are continuously used by people using cryptocurrencies are:
DYOR: Do Your Own Research
Dapps: Decentralized Applications
Spike: Shapr increase in the price of the Cryptocurrency
Pump: Manipulated increase in the price of a cryptocurrency
Dump: Shapr decline in the price of Cryptocurrency
23. How can I check the value of cryptocurrencies?
Various platforms will give you an update on the price of cryptocurrencies. You can keep a tab on them and check the pricing of cryptocurrencies.
24. What are the advantages of using digital currencies?
There are various advantages like you are saved from double-spending, the transactions are aster and secure. Moreover, digital currencies now have global acceptance.
25. What is the difference between cryptocurrencies and fiat currencies?
Cryptocurrencies are digital currencies which run on the Blockchain platform and are not governed by any government agencies, while the fiat currencies are the ones which are governed by authorities and government.
Conclusion- This was all the FAQs pertaining to cryptocurrency, for more such information keep coming back to Blockchain Council.
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Proof of Work (commonly abbreviated to PoW) is a mechanism for preventing double-spends. Most major cryptocurrencies use this as their consensus algorithm. That’s just what we call a method for securing the cryptocurrency’s ledger.
Proof of Work was the first consensus algorithm to surface, and, to date, remains the dominant one. It was introduced by Satoshi Nakamoto in the 2008 Bitcoin white paper, but the technology itself was conceived long before then.
Adam Back’s HashCash is an early example of a Proof of Work algorithm in the pre-cryptocurrency days. By requiring senders to perform a small amount of computing before sending an email, receivers could mitigate spam. This computation would cost virtually nothing to a legitimate sender, but quickly add up for someone sending emails en masse.
What is a double-spend?A double-spend occurs when the same funds are spent more than once. The term is used almost exclusively in the context of digital money — after all, you’d have a hard time spending the same physical cash twice. When you pay for a coffee today, you hand cash over to a cashier who probably locks it in a register. You can’t go to the coffee shop across the road and pay for another coffee with the same bill.
In digital cash schemes, there’s the possibility that you could. You’ve surely duplicated a computer file before — you just copy and paste it. You can email the same file to ten, twenty, fifty people.
Since digital money is just data, you need to prevent people from copying and spending the same units in different places. Otherwise, your currency will collapse in no time.
For a more in-depth look at double-spending, check out Double Spending Explained.
Why is Proof of Work necessary?If you’ve read our guide to blockchain technology, you’ll know that users broadcast transactions to the network. Those transactions aren’t immediately considered valid, though. That only happens when they get added to the blockchain.
The blockchain is a big database that every user can see, so they can check if funds have been spent before. Picture it like this: you and three friends have a notepad. Anytime one of you wants to make a transfer of whatever units you’re using, you write it down — Alice pays Bob five units, Bob pays Carol two units, etc.
There’s another intricacy here — each time you make a transaction, you refer to the transaction where the funds came from. So, if Bob was paying Carol with two units, the entry would actually look like the following: Bob pays Carol two units from this earlier transaction with Alice.
Now, we have a way to track the units. If Bob tries to make another transaction using the same units he just sent to Carol, everyone will know immediately. The group won’t allow the transaction to be added to the notepad.
Now, this might work well in a small group. Everyone knows each other, so they’ll probably agree on which of the friends should add transactions to the notepad. What if we want a group of 10,000 participants? The notepad idea doesn’t scale well, because nobody wants to trust a stranger to manage it.
This is where Proof of Work comes in. It ensures that users aren’t spending money that they don’t have the right to spend. By using a combination of game theory and cryptography, a PoW algorithm enables anyone to update the blockchain according to the rules of the system.
How does PoW work?Our notepad above is the blockchain. But we don’t add transactions one by one — instead, we lump them into blocks. We announce the transactions to the network, then users creating a block will include them in a candidate block. The transactions will only be considered valid once their candidate block becomes a confirmed block, meaning that it has been added to the blockchain.
Appending a block isn’t cheap, however. Proof of Work requires that a miner (the user creating the block) uses up some of their own resources for the privilege. That resource is computing power, which is used to hash the block’s data until a solution to a puzzle is found.
Hashing the block’s data means that you pass it through a hashing function to generate a block hash. The block hash works like a “fingerprint” — it’s an identity for your input data and is unique to each block.
It’s virtually impossible to reverse a block hash to get the input data. Knowing an input, however, it’s trivial for you to confirm that the hash is correct. You just have to submit the input through the function and check if the output is the same.
In Proof of Work, you must provide data whose hash matches certain conditions. But you don’t know how to get there. Your only option is to pass your data through a hash function and to check if it matches the conditions. If it doesn’t, you’ll have to change your data slightly to get a different hash. Changing even one character in your data will result in a totally different result, so there’s no way of predicting what an output might be.
As a result, if you want to create a block, you’re playing a guessing game. You typically take information on all of the transactions that you want to add and some other important data, then hash it all together. But since your dataset won’t change, you need to add a piece of information that is variable. Otherwise, you would always get the same hash as output. This variable data is what we call a nonce. It’s a number that you’ll change with every attempt, so you’re getting a different hash every time. And this is what we call mining.
Summing up, mining is the process of gathering blockchain data and hashing it along with a nonce until you find a particular hash. If you find a hash that satisfies the conditions set out by the protocol, you get the right to broadcast the new block to the network. At this point, the other participants of the network update their blockchains to include the new block.
For major cryptocurrencies today, the conditions are incredibly challenging to satisfy. The higher the hash rate on the network, the more difficult it is to find a valid hash. This is done to ensure that blocks aren’t found too quickly.
As you can imagine, trying to guess massive amounts of hashes can be costly on your computer. You’re wasting computational cycles and electricity. But the protocol will reward you with cryptocurrency if you find a valid hash.
Let’s recap what we know so far:
That’s where public-key cryptography comes in. We won’t go into depth in this article, but check out What is Public-Key Cryptography? for a comprehensive look at it. In short, we use some neat cryptographic tricks that allow any user to verify whether someone has a right to move the funds they’re attempting to spend.
When you create a transaction, you sign it. Anyone on the network can compare your signature with your public key, and check whether they match. They’ll also check if you can actually spend your funds and that the sum of your inputs is higher than the sum of your outputs (i.e., that you’re not spending more than you have).
Any block that includes an invalid transaction will be automatically rejected by the network. It’s expensive for you to even attempt to cheat. You’ll waste your own resources without any reward.
Therein lies the beauty of Proof of Work: it makes it expensive to cheat, but profitable to act honestly. Any rational miner will be seeking ROI, so they can be expected to behave in a way that guarantees revenue.
Proof of Work vs. Proof of StakeThere are many consensus algorithms, but one of the most highly-anticipated ones is Proof of Stake (PoS). The concept dates back to 2011, and has been implemented in some smaller protocols. But it has yet to see adoption in any of the big blockchains.
In Proof of Stake systems, miners are replaced with validators. There’s no mining involved and no race to guess hashes. Instead, users are randomly selected — if they’re picked, they must propose (or “forge”) a block. If the block is valid, they’ll receive a reward made up of the fees from the block’s transactions.
Not just any user can be selected, though — the protocol chooses them based on a number of factors. To be eligible, participants must lock up a stake, which is a predetermined amount of the blockchain’s native currency. The stake works like bail: just as defendants put up a large sum of money to disincentivize them from skipping trial, validators lock up a stake to disincentivize cheating. If they act dishonestly, their stake (or a portion of it) will be taken.
Proof of Stake does have some benefits over Proof of Work. The most notable one is the smaller carbon footprint — since there’s no need for high-powered mining farms in PoS, the electricity consumed is only a fraction of that consumed in PoW.
That said, it has nowhere near the track record of PoW. Although it could be perceived as wasteful, mining is the only consensus algorithm that’s proven itself at scale. In just over a decade, it has secured trillions of dollars worth of transactions. To say with certainty whether PoS can rival its security, staking needs to be properly tested in the wild.
Closing thoughtsProof of Work was the original solution to the double-spend problem and has proven to be reliable and secure. Bitcoin proved that we don’t need centralized entities to prevent the same funds from being spent twice. With clever use of cryptography, hash functions, and game theory, participants in a decentralized environment can agree on the state of a financial database.
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If you’ve ever heard the word cryptocurrency, then you’ve probably heard about the mining as well. If you still don’t know what cryptocurrency mining is and about profitable, keep reading!
In order to understand crypto mining, you need to fully understand what a cryptocurrency is first. Unlike traditional currencies (aka fiat currency), a cryptocurrency is a digital asset that works in a decentralized way; it does not require a bank or a third-party to operate. Someone can send someone else a cryptocurrency directly without any third-party involved.
The first ever cryptocurrency created was Bitcoin.
Every single cryptocurrency has a blockchain, which is an immutable digital ledger. A single transaction is recorded on the blockchain permanently, which no one can edit or delete it randomly.
A blockchain works by incentivizing miners to confirm the authenticity of each transaction. A person who confirmed the authenticity of the transaction, get the cryptocurrency as a reward.
Since the cryptocurrencies are based on cryptography, the miners need to solve extremely complicated mathematical problems to verify each transaction. They are incentivized to do it because they are rewarded for it.
Anyone can participate in mining from anywhere in the world as long as they have a computer. When the number of miners increases, it allows cryptocurrencies to be more secure. Even if an attacker would want to attack the blockchain network, somehow, an attacker needs to know 51% or more miners. Since the miners are spread around the world, this task is close to impossible and most likely not economically viable.
Types of Crypto MiningBitcoin was the first cryptocurrency to introduce the Proof-of-Work (PoW) consensus algorithm, where users have to solve complex mathematical problems in order to process transactions and secure the whole network.
Bitcoin was quite easy to mine at first, and you could do it with your CPU, there was no need for special equipment, and the rewards were huge. However, today, Bitcoin’s mining difficulty has increased considerably, and users need specialized and expensive equipment to mine it.
There are four main types of mining when it comes to the PoW algorithm. There is a CPU, GPU, ASIC, and Cloud mining.
The first three are essentially the same, but they use different parts of your computer. There are some cryptocurrencies specifically created to be mined only through CPU and to be ASIC resistant. Other cryptocurrencies can be mined through all three methods.
Cloud mining, on the other hand, is a process where a user basically pays to rent out a mining machine somewhere else. You don’t have to buy the equipment physically but it is wise to carry out due diligence and research into who and what you are paying for.
Proof of Stake ‘Mining’With the introduction of the Proof-of-Stake (PoS) consensus algorithm, cryptocurrency mining changed forever. In this case, users don’t have to solve computationally intensive puzzles. In PoS-based cryptocurrencies, the creator of blocks is chosen via random selection or wealth.
Validators in the PoS consensus have to lock up some of their coins as a ‘stake’ and will get rewarded for it.
There are many benefits over the traditional PoW like lower cost and more energy efficiency. Additionally, because PoS encourages users to hold the coin in the wallet, it stabilizes the price a bit more than conventional cryptocurrencies.
Today, you can find plenty of exchanges that support staking, including the most popular exchange, Binance. The safest option, however, is always going to be staking using your own private wallet.
Proof of Formulation ‘Mining’FLETA has developed the most innovative and newest consensus algorithms known as Proof-of-Formulation (PoF).
This PoF consensus algorithm uses something called the ‘Synchronization Group’, which allows all of the miners to mine in an orderly manner. The generating block time only takes 0.5 seconds, and the observer node checks the irregular blocks in real-time, which prevents the fork and double-spending. Furthermore, FLETA’s PoF algorithm is currently undergoing the patent process through the United States Patent Office (Application Number: 62717695).
The users can easily create a FLETA formulator through the official FLETA wallet. The minimum amount to create a single Formulator is 200,000 FLETA. The blockchain network is operated by FLETA and requires a 6-core CPU or higher.
As you created at least four Formulators, you will be able to upgrade it, which allows you to get 1.3 times more rewards.
Besides creating a Formulator, users can contribute to mining with a minimum amount of 100 FLETA.
ConclusionToday, various mining methods exist, each with their pros and cons. However, cryptocurrency miners are still craving more convenient (and less costly) ways to earn rewards.
FLETA’s Proof-of-Formulation consensus is not only fast, but it is also highly secure the added layer of protection between observer nodes, formulator, and the synchronization group.
With plenty more to come, in terms of DApp development, games and partnerships, FLETA’s PoF is increasingly becoming the preferred consensus of many developers due to the speed, security and convenience of the platform.
Any computer that connects to the Bitcoin network is called a node. Nodes that fully verify all of the rules of Bitcoin are called full nodes.In other words, full nodes are what verify the Bitcoin blockchain and they play a crucial role in maintaining the decentralized network. Full nodes store the entirety of the blockchain and validate transactions. Anyone can participate in the Bitcoin network and run a full node. Bitcoin.org has information on how to set up a full node. Running a full node also gives you wallet capabilities and the ability to query the blockchain.
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