Ethereum is a decentralized platform for creation of new cryptocurrecies and decentralized application (DAPPS) . On the ethereum blockchain you can write codes to create new cryptocurrencies using the ethereum smart contract and applications which coukld be accessible worldwide. In a nutshell, ethereum is an open software platform based on blockchain technology that enables developers to build and deploy decentralized applications (DAPPS). Ethereum whitepaper was first published by vitalik buterin on November 2013. The original ethereum development team which consisted of vitalik buterin, Mihai Alisie, Anthony Di Iorio and Charlse Hoskinson announced publicly on January 2014 about the development of ethereum platform. Ethereum ends their ICO after they successfully raised $18.4 million on August 2014.