History: Ethereum Timeline
Vitalik Buterin described Ethereum as a concept in a White Paper in late 2013. This concept was developed by Dr. Gavin Wood who eventually published a technical Yellow Paper in April 2014. Since then, the development of Ethereum has been managed by a community of developers.
A crowdsale to fund development took place in July and August 2014, and the blockchain was went live on 30 July 2015.
Ethereum crowdsale
The development team was funded by an online sale of ETH tokens during July to August 2014 where people could buy ETH tokens by paying in Bitcoin, at an initial fixed rate of 2000 ETH for 1 BTC (currently in Oct 2016 1 BTC will buy you 50 ETH on the open market).
Crowdsale participants sent bitcoins to a bitcoin address and received a wallet containing the number of ETH bought. Technical details are on Ethereum’s blog https://blog.ethereum.org/2014/07/22/launching-the-ether-sale/
A little over 60m ETH was sold this way for a little over 31,500 BTC, worth about US$18m at the time. An additional 20% (12m ETH) were created to fund development and the Ethereum Foundation.
Software Release codenames: Frontier / Homestead / Metropolis / Serenity
These are friendly names for versions of the core Ethereum software, a little like Apple’s OS X version names such as Mavericks, El Capitan, Sierra.
Olympic (testnet): Launched May 2015 – a testing release where coins are not compatible with ‘real’ ETH. A testnet still runs in parallel to the main live network so that developers can test their code.
Frontier: Launched 30 July 2015 – an initial live release with a way for people to mine ETH and build and run contracts.
Homestead: Launched 14 March 2016 – some protocol changes, more stability.
Metropolis: Future launch – moving from command-line to graphical interfaces.
Serenity: Future launch – moving from Proof of Work to Proof of Stake (Casper).
The 'open source' movement officially emerged in 1996, as a marketing program for free software adoption within businesses. It framed free software adoption in a way that businesses could understand.zebra bitcoin Bitcoin is pseudonymous, meaning that funds are not tied to real-world entities but rather bitcoin addresses. Owners of bitcoin addresses are not explicitly identified, but all transactions on the blockchain are public. In addition, transactions can be linked to individuals and companies through 'idioms of use' (e.g., transactions that spend coins from multiple inputs indicate that the inputs may have a common owner) and corroborating public transaction data with known information on owners of certain addresses. Additionally, bitcoin exchanges, where bitcoins are traded for traditional currencies, may be required by law to collect personal information. To heighten financial privacy, a new bitcoin address can be generated for each transaction.количество bitcoin
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