Block Chain blocks Chain

Block Chain characteristics

-Go to the center: there is no need to establish a series of infrastructure based on PKI, also eliminates the corresponding maintenance costs
-Low cost/trading quota can be very low
-Tamper-proof, history can be traced and validated: because it is based on proof-of-work, so if the number of bad nodes is less than 1/3, then you can guarantee that the transaction is difficult to tamper with, and a block plus about 10min, as time progresses, The late-added block competition has decreased the probability index of the original block, and the probability of the late block number will decrease exponentially with the block difference; Generally the next transaction is done after adding 6 blocks, so about 1h. To avoid such delays, middlemen, such as trustworthy institutions, can be used, but the security of a transaction relies on credibility rather than the agreement itself.
-Anonymous
-Relative Bitcoin more scenarios: Smart contract Problem

-Power consumption: proof-of-work requires a large number of hash attempts, can be based on the Proof-of-stake, that is, more people have more votes, but this assumption is a bit far-fetched.
-A potential risk problem under fast trading
-Regulatory Industry Progress

-Super Book Project ushered in the first Chinese company--Ai Ying Digital Finance, Deloitte Jennifer Qin: Future financial industry inseparable from block chain technology and AI, HBR block chain global economic Map summit
-ibm:hyper-ledger,opensource

SecurityLevel: = 256
HashAlgorithm: = "SHA3" Aes256gsmstreamcipher should be aes256gcmstreamcipher=galois/
Counter Mode AES Stream cipher
block:128, key:256 pkcs7padding ECIES=ECDSA
(521) +rand+x509 (certificate pk/sk)

-ripple, Ethereum
-israel Blockchain company Deloitte Fintech the other Related:

M-PESA:A Mobile phone-based money transfer, financing and microfinancing service, launched in 2007 by Vodafonefor Safaric Om and Vodacom, the largest mobile network operators in Kenya and Tanzania.