# 블록체인 개념
Fundamentally, a blockchain is a data structure. It is a linked list, or chain, of unique “blocks.” Each block points
to the previous one, and is itself a list of transactions. On top of this relatively simple list-of-lists data structure is
laid the key innovation that blockchains have given us: a protocol for how blocks are added to the chain without
any central authority.
# 이더리움
• The cryptocurrencies that have come along with blockchains are a means to an end, providing incentives for
people to run software that secures the network. For the first time in history, we have the ability to share digital
information without trusting any person, government, organization, or corporation to facilitate the interaction.
• Ethereum provides a cryptographically secure platform for storing, updating, and removing data from a blockchain
using what is referred to as “smart contracts.”
• Solidity is a popular programming language for developing smart contracts, and was designed to run on the
Ethereum Virtual Machine (EVM). Solidity wasn’t the first programming language to run on the EVM, and it certainly
isn’t the last. Many other languages, such as Vyper, will be written to run on the EVM, attempting to improve on
Solidity’s design or provide powerful domain-specific languages.
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