https://www.youtube.com/watch?v=qOVAbKKSH10&t=91s https://www.youtube.com/watch?v=HneatE69814

blockchain:

a combination of encryption and discributed system a distributed secure database

consensus algorithm

in order to make an entry on the blockchain database all the computers have to agree about its state so that no one computer can make an alternation without the consensus of the others –>proof of work

distributed ledger

secure distributed records

each block

each block consists of the data, hash and the hash of the previous block

proof of work

mining the block need 10 mins at least

why security

hash, proof of work and distributed

smart contracts

will the block chain be too big to store in personal device?

yes, full, fast, light

tokens

like stoken you give money, and return with the tokens

blockchain crowdfunding

will they use bitcoin?

how smart contracts do with the music service?

how ethereum use private key public key validate account?

https://medium.com/@angellopozo/ethereum-signing-and-validating-13a2d7cb0ee3 https://hackernoon.com/a-closer-look-at-ethereum-signatures-5784c14abecc https://yos.io/2018/11/16/ethereum-signatures/