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Bitcoins Explained

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Bitcoins Explained

Written by: H. Howard

Bitcoin is the first global, decentralized currency. It was invented by Satoshi Nakamoto who published his idea in 2008 and released the software in 2009. Since then, this global currency has expanded and, in February 2015, the number of merchants accepting Bitcoins passed 100,000. This digital method of payment allows individuals to pay other users directly, without use of a central authority that monitors transactions.

The fact that Bitcoin is ‘decentralized’ means that no-one owns or controls the software. Instead the software is open-source meaning that anybody can access and alter the code, changing aspects of it. Simply put, the software is designed by the users, for the users.

As Bitcoin does not have a central authority to monitor payments, it makes use of miners to verify transactions. These miners are Bitcoin users who are rewarded with newly generated Bitcoins for approving transactions and recording them in the transparent public ledger, called the block chain. This is a record of all Bitcoin transactions and can be viewed by anyone.

The way that Bitcoin is run provides many advantages:

  • There are lower fees due to no third party. Fees are only paid as a token to the miners who authorize Bitcoin transactions. As these miners are rewarded with newly generated bitcoins, the fee is simply a gesture that may mean a faster confirmation of payment for the users.
  • Transactions can occur between any country because Bitcoin is a global currency
  • There are no minimum or maximum limits on transactions
  • An account cannot be frozen
  • There is no waiting time for completed transactions
  • It is easy and free to set up
  • It is easy to carry out transactions
  • Personal details are not required to complete transactions
  • Because of Bitcoin’s cryptographic nature, it is a very secure system

As noted, Bitcoin is easy to set up and use and can be broken down into three simple steps:

  • Buy and sell Bitcoins for normal currency

Bitcoins can be bought easily online using a number of different payment methods including credit/ debit cards, wire transfers and e-wallet providers.

The units of Bitcoin are bitcoins (BTC). These are currently worth £306. It is also possible to get millibitcoins (mBTC) worth one thousandth of a bitcoin, microbitcoins (μBTC), also referred to as a ‘bit’, worth one millionth and a satoshi, the smallest unit, worth one hundred millionth.

  • Bitcoins are stored in either an online or offline storage system called a Bitcoin wallet. Bitcoin wallets store your bought or mined Bitcoins or, more precisely, hold the information required to create transactions using your Bitcoins. This information consists of secure digital keys that allow you to access your online Bitcoin address and sign any transactions that you wish to make. There are many types of Bitcoin wallet; desktop, mobile, online, hardware, ledger USB and paper.
  • Bitcoins can be transferred, hassle free, and used at many online casinos.

When creating a transaction, a private key is used to sign a message detailing the Bitcoin address of the sender, the amount and the Bitcoin address of the receiver. Transactions are usually confirmed by mining within 10 minutes.

Bitcoin Wallets

Choosing your Bitcoin wallet is important in keeping your funds safe and easily accessible.

Online wallets

Online wallets are arguably the easiest to set up and has the added convenience of being accessible from anywhere. However, storing your digital keys online comes with a potential risk of giving control of your bitcoins to the organization and allowing them to be susceptible to security breaches of the website.

Desktop wallets

Desktop wallets are software programs that you can download onto your computer that store your digital keys for Bitcoin transactions. Because the information is not stored online, these wallets offer more security than online wallets but are more difficult to set up. There are many options for desktop wallets including MultiBit, Hive, Bitcoin core, Amory and Bitcoin Qt. Some, such as Dark Wallet, also focus on increasing anonymity by coin mixing.

Mobile wallets

Mobile wallets run with the use of smartphone apps that have the added benefit of allowing customers to pay directly with their phones for offline purchases. Some wallets also make use of near field communication, allowing you to simply tap your phone against a reader to transfer bitcoins for your purchases. Unlike online wallets, mobile wallets are not full Bitcoin clients. This means that, because of the limited storage of a mobile phone, the wallet will download only a small section of the block chain to verify transactions. Examples of mobile wallets include Bitcoin Wallet, Mycelium, Xapo and Aegis Bitcoin Wallet that can even be used on your Android smartwatch.

Hardware wallets

Trezor and Ledger USB are both examples of hardware wallets but there are currently relatively few options for this kind of Bitcoin wallet. Despite this, these wallets are a more secure way to electronically store your digital keys as there is no need for a third party storage service.

Paper wallets

These are the most secure way to store large quantities of Bitcoins as your private keys are not digitally stored anywhere meaning that there is no risk of cyber attack or loss due to hardware failure. Instead, paper wallet services will create an image containing two QR codes with the information of your public address for sending and receiving Bitcoins and your private key.

Making your Bitcoin wallet more secure

There are a number of ways that you can increase the security of your Bitcoin wallets. This is important as if a private code is lost, there will be no way to access your Bitcoins.

  • Encrypt with a strong password

Adding passwords to your wallets can make your Bitcoins more secure. However, this cannot protect against key logging hardware that may allow thieves to access your passwords.

  • Multi-signature transactions

This allows you to request that multiple independent signatures are required to verify a transaction. This can be a friend, a partner or even simply a second device that you own.

  • Keep large amounts of bitcoins in an offline wallet.
  • Back up your wallet.

Regularly backing up your wallet can help to protect against losing your private key through loss of devices or hardware failures.

  • Update wallet provider software for added security features.

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