Block creation in Blockchain

 ## PROOF OF WORK (PoW) ## In the earliest day of bitcoin, to make sure that all the computers agree in one common global state, they are competing with hashing power by the use of CPU, GPU, FGPA, ASIC. Those who has the most computing power could win the race and mining farm start to appear. http://csef.ru/media/articles/7921/9207.jpg But there are some problem that people relies on cheap energy source which is why China is the best place for all the miners to centralized in one region and also cause pollution in the area. https://s.yimg.com/ny/api/res/1.2/V5CF3xFa6Fk.46LsO_h07g--/YXBwaWQ9aGlnaGxhbmRlcjtzbT0xO3c9MTI4MDtoPTk2MDtpbD1wbGFuZQ--/http://media.zenfs.com/en_us/News/ap_webfeeds/443970297e3cd023400f6a706700bfec.jpg ## PROOF OF STAKE (PoS) ## By not spending the computing power to consume tremendous electricity, product hardware-based or region-based blockchain system, another solution is to consume money in stead. Those who has money has big voice in creating block, if you play by the rule of game you win and if not you lose your money. https://cdn-images-1.medium.com/max/660/1*WgROsTKa6diRYTG5K0R5mw.jpeg People take turns to create the block and get reward, those who've got more money has more chance to be selected has validator and creator of the block and sometimes the rich get richer. ## DELEGATED PROOF OF STAKE (DPoS) ## A modified version of Proof of Stake is Delegated Proof of stake which also used in Bitshares and Steemit. A numbers of Witnesses has been selected randomly to create the block and to make sure the integrity of the system. SEREY inspired by this consensus and used in SEREY Platform. https://i.ytimg.com/vi/savIWmJir8g/maxresdefault.jpg ## MASTER NODE ## Beside the consensus above DashCoin uses Master Node which is differ from the miner node, similar to the leader based decision making system. To become the master node you need to deposit some fund 1000 dash coin for example. The weak point is attacker might always seek for the master node or leader and attack it to make the single point of failure for the system. ## TANGLE & HASHGRAPH ## IoTA trying to make the blockchain technology revolutionize by creating complex data structure not just a link list or blockchain but a graph, every transaction is a block and need to validate two other block. The Graph data structure is then moving up to another level called HashGraph which originally only work for Private Blockchain but now there exists a Public version of HashGraph called Hedera Hashgraph. https://cdn-images-1.medium.com/max/2000/1*o3MbsQRM_-sdnnOSbGYShQ.png https://i.ytimg.com/vi/wgwYU1Zr9Tg/maxresdefault.jpg The invention of Bitcoin Peer to Peer Electronic Cash System was in 2008 and now is 2018, more to come. Written by: @Cryptopreneur