Blockchain explained in plain English
Understanding how blockchain works and identifying myths about its powers are the first steps to developing blockchain technologies
Video: Blockchain in 60 seconds
After spending two years researching blockchain and the evolution of advanced ledger technologies, I still find a great spectrum of understanding across my clients and business at large about blockchain. While ledger superpowers like Hyperledger, IBM, Microsoft and R3 are emerging, there remains a long tail of startups trying to innovate on the first generation public blockchains. Most of the best-selling blockchain books confine themselves to Bitcoin, and extrapolate its apparent magic into a dizzying array of imagined use cases. And I'm continuously surprised to find people who are only just hearing about blockchain now.
It can seem that everyone is talking about blockchain and ledger technologies, but the truth is most people are not yet up to speed. No one should be shy to ask what blockchain is really all about.
Many blockchain primers and infographics dive into the cryptography, trying to explain to lay people how "consensus algorithms", "hash functions" and digital signatures all work. In their enthusiasm, they can speed past the fundamental question of what blockchain was really designed to do. I've long been worried about a lack of critical thinking around blockchain and the activity it's inspired. If you want to develop blockchain applications you only need to know what blockchain does, and not how it does it.
So I've written a report that explains how the blockchain works. It examines the founding principles of blockchain, describes its properties, and dispels common myths about its powers. The explanation below is an abridged excerpt from the report.
WHAT IS BLOCKCHAIN?
Blockchain is an algorithm and distributed data structure for managing electronic cash without a central administrator among people who know nothing about one another. Originally designed for the crypto-currency Bitcoin, the blockchain architecture was driven by a radical rejection of at (government-guaranteed) money and bank-controlled payments.
Blockchain is a special instance of Distributed Ledger Technologies (DLTs), almost all of which have emerged in Bitcoin's wake.
HOW DOES BLOCKCHAIN WORK?
Blockchain is a Distributed Ledger Technology (DLT) that was invented to support the Bitcoin cryptocurrency. Bitcoin was motivated by an extreme rejection of government-guaranteed money and bank-controlled payments. The developer of Bitcoin, Satoshi Nakamoto envisioned people spending money without friction, intermediaries, regulation or the need to know or trust other parties.
Technically, the original blockchain is separable from Bitcoin, but this report will show that the blockchain design is so specific to Bitcoin that it's not a good fit for much else.
The central problem in electronic cash is Double Spend. Because pure electronic money is just data, nothing stops a currency holder from trying to spend it twice. Blockchain solves the Double Spend problem without a digital reserve fund or similar form of umpire.
Blockchain monitors and verifies Bitcoin transactions by calling upon a decentralized network of volunteer-run nodes to, in effect, vote on the order in which transactions occur. The network's algorithm ensures that each transaction is unique.
Several thousand nodes make up the Bitcoin network. Once a majority of nodes reaches consensus that all transactions in the recent past are unique (that is, not double spent), they are cryptographically sealed into a block. Each new block is linked to previously sealed blocks to create a chain of accepted history, thereby preserving a verified record of every spend.
The Bitcoin blockchain's functionality and security results from the network of thousands of nodes agreeing on the order of transactions. The diffuse nature of the network ensures transactions and balances are recorded without bias and are resistant to attack by even a relatively large number of bad actors. In fact, the record of transactions and balances remains secure as long as a simple majority (51 percent) of nodes remains independent. Thus, the integrity of the blockchain requires a great many participants.
One of the Bitcoin blockchain's most innovative aspects is how it incentivizes nodes to participate in the intensive consensus-building process by randomly rewarding one node with a fixed bounty (currently 12.5 BTC) every time a new block is settled and committed to the chain. This accumulation of Bitcoin in exchange for participation is called "mining" and is how new currency is added to the total system afloat.
Posted by
Thomas Prendergast
Founder
Original article is here: http://www.zdnet.com/article/blockchain-explained-in-plain-english/
The Blockchain Explained
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ReplyDeleteCrypto economics: time to remove intermediaries
ReplyDeleteThere are mediators in any economic relations. There are so many of them that even laws treat mediation as a separate type of activity.
Thus, the Civil Code identifies five types of intermediaries:
• Commercial representatives: they receive instructions from entrepreneurs and fulfill them;
• Commission agents: try to sell goods produced by the manufacturer;
• Attorneys receive orders from entrepreneurs to sell goods and try to promote sales as much as possible;
• Agents: conclude contracts for sale of goods on behalf of entrepreneurs;
• Distributors: conduct wholesale trade in goods which are delivered to them by the producer.
Do we need the above mediators? Undoubtedly, in some cases they perform useful functions. For example, if the manufacturer is experiencing difficulties with sale of goods or it is difficult to deal with the nuances of the legislation, it chooses a good intermediary and pays it for high-quality services.
There is nothing wrong with the above example. However, the problem is that this does not always happen. Most often, intermediaries do not do anything, but want to get a percent (and rather big) of each transaction.
Apparently, what’s wrong with that? Many believe that if producers need intermediaries and are willing to pay them, then so be it. However, such an opinion is fundamentally wrong.
After all, the manufacturer lays down the cost of intermediary services in the value of the goods. Because of this, product prices are constantly rising, and buyers spend more and more money. In the short term, it is only consumers that suffer. But in the long run, economic growth and living standards are declining.
Crypto economy breaks artificial barriers between the producer and the end user of goods. They will be able to interact with each other through platforms that do not obey anyone.
Industrial decentralization is the future. Both buyers of goods and the companies that produce them will benefit from the crypto economy. Ultimately, this will make society healthier and fairer.
Middlemen will disappear from production with the advent of the Yodse platform. It is a unique space where producers and consumers find each other. Yodse assumes only direct interaction between users; there is no place for intermediaries here.
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