Bitcoin Монета - What is it?

How Bitcoins Work
Bitcoins are completely virtual coins designed to be self-contained for their value, with no need for banks to move and store the money. Once bitcoins are owned by a person, they behave like physical gold coins. They possess value and trade just as if they were nuggets of gold. Bitcoins can be used to purchase goods and services online with businesses that accept them or can be tucked away in the hope that their value increases over time.

Bitcoins are traded from one personal wallet to another. A wallet is a small personal database that is stored on a computer drive, smartphone, tablet, or in the cloud.

Bitcoin logo
KTSDESIGN/SCIENCE PHOTO LIBRARY / Getty Images
Bitcoins are forgery-resistant because multiple computers, called nodes, on the network must confirm the validity of every transaction. It is so computationally intensive to create a bitcoin that it isn't financially worth it for counterfeiters to manipulate the system.

Bitcoin Values and Regulations
A single bitcoin varies in value daily. Check places like Coindesk to see current par rates. There's more than $2 billion worth of bitcoins in existence. Bitcoins will stop being created when the total number reaches 21 billion coins, which is estimated to be sometime around the year 2040. By 2017, more than half of those bitcoins had been created.

Bitcoin currency is completely unregulated and completely decentralized. The currency is self-contained and uncollateralized, meaning there's no precious metal behind the bitcoins. The value of each bitcoin resides within the bitcoin itself.

Bitcoins are stewarded by miners, the network of people who contribute their personal computer resources to the bitcoin network. Miners act as ledger keepers and auditors for all bitcoin transactions. Miners are paid for their accounting work by earning new bitcoins for the amount of resources they contribute to the network.

How Bitcoins Are Tracked
A bitcoin holds a simple data ledger file called a blockchain. Each blockchain is unique to each user and the user's personal bitcoin wallet.

Digital network
Dong Wenjie / Getty Images
All bitcoin transactions are logged and made available in a public ledger, which ensures their authenticity and prevents fraud. This process prevents transactions from being duplicated and people from copying bitcoins.

While every bitcoin records the digital address of every wallet it touches, the bitcoin system does not record the names of the people who own wallets. In practical terms, this means that every bitcoin transaction is digitally confirmed but is completely anonymous at the same time.

So, although people cannot easily see the personal identity or the details of the transaction, they can see the verified financial history of a bitcoin wallet. This is a good thing, as a public history adds transparency and security to every transaction.

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In Consortium Blockchain, the consensus process is controlled by only specific nodes. However, ledgers are visible to all participants in the consortium Blockchain. Example, Ripple.исходники bitcoin ethereum coingecko cryptocurrency mining bitcoin boom платформу ethereum ethereum хешрейт

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сбербанк bitcoin bitcoin background keepkey bitcoin wei ethereum конвектор bitcoin Why must miners run these hash functions over and over again, if doing it once – a near-instantaneous process for a modern computer – would do the trick? The reason is that, by harnessing a lot of hash power, an attacker could spend some coins, then pile a huge number of spam transactions on top of it – ones that do not reference the attacker's original spend. In this way they could spend their coins and have them too; this is known as a double-spend attack. By requiring the network to plug through millions or billions of hash functions, the blockchain generates so much 'work' that undoing it or overwhelming it would be too expensive. (Since a given set of data only generates one hash output, miners must append meaningless numbers known as nonces to the end and run the function again.)Benefits of Cryptocurrencymatteo monero

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