What is Blockchain Technology?
The Beginner’s Guide to Blockchain
If you’re just getting started with cryptocurrency, you have probably heard the term “blockchain technology” used to describe a wide variety of concepts.
The term is, admittedly, a broad one. You’re just as likely to encounter blockchain in a white paper for a new cryptocurrency as you are in an advertisement from a major company like IBM.
So, what does the term mean and why is it so widely used? Blockchain most often refers to a network of computers that uses a common software to order data in such a way that, after being sequenced, ensures it can’t be adjusted or tampered with by any one dishonest user.
Put another way, a blockchain creates a trusted record using cryptography.
While most commonly associated with the Bitcoin white paper, the concept is an older one, and elements of this design can be traced to the work on which Bitcoin’s creator, Satoshi Nakamoto, referenced in the project’s founding document.
Note: as of 2020, there remains debate over what the definition of blockchain technology should be and if and when it’s being correctly applied.
This is due to the fact that there has been an effort to abstract the architecture of blockchains for uses beyond the ordering of transactions in cryptocurrencies.
Some of these efforts will undoubtedly stretch the technology’s application too far, contributing to a more realistic understanding of its expected impact.
How does blockchain work?
At its most broad, the term blockchain describes a public records system managed by a distributed network of computers called nodes.
These nodes must constantly work to record all updates to the network. What makes a blockchain unique is that all nodes maintain a copy of the ledger.
Before diving deeper into the technology, it is important to understand the characteristics that make a blockchain work.
Generally (and with some exceptions), blockchains aim to be:
Auditable – Updates stored in the blockchain can easily be tracked and verified.
Distributed – Blockchains often aim to remain outside the control of a single entity (or are collectively managed by a broad set of known stakeholders).
Immutable – Once a transaction is recorded on the ledger, it can never be changed (or if it is, it must be to the agreement of its stakeholders).
Pseudonymous - Each user that interacts with the blockchain does so with a generated address that does not reveal their identity.
Components of blockchain technology
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- What is Bitcoin? (BTC)
- What is Ethereum? (ETH)
- What is Ripple? (XRP)
- What is Bitcoin Cash? (BCH)
- What is Litecoin? (LTC)
- What is Chainlink? (LINK)
- What is EOSIO? (EOS)
- What is Stellar? (XLM)
- What is Cardano? (ADA)
- What is Monero? (XMR)
- What is Tron? (TRX)
- What is Dash? (DASH)
- What is Ethereum Classic? (ETC)
- What is Zcash? (ZEC)
- What is Basic Attention Token? (BAT)
- What is Algorand? (ALGO)
- What is Icon? (ICX)
- What is Waves? (WAVES)
- What is OmiseGo? (OMG)
- What is Gnosis? (GNO)
- What is Melon? (MLN)
- What is Nano? (NANO)
- What is Dogecoin? (DOGE)
- What is Tether? (USDT)
- What is Dai? (DAI)
- What is Siacoin? (SC)
- What is Lisk? (LSK)
- What is Tezos? (XTZ)
- What is Cosmos? (ATOM)
- What is Augur? (REP)
What is blockchain used for?
As mentioned, the idea that there are blockchain use cases beyond cryptocurrency is still new.
This means there has been an endless number of proposed use cases for these computing networks, some more realistic and practical than others.
Below is a list of industries that have attempted to incorporate blockchain technology with varying degrees of success.
Blockchain technology’s original, and still most popular, use case is to power cryptocurrencies.
In fact, some would argue blockchains are their central element, allowing users to run software that then enforces the rules around their currencies, making this data scarce and valuable.
Because of their blockchains, cryptocurrencies can be borderless, durable, irreversible, permissionless or pseudonymous.
If you would like more information on how blockchains help power cryptocurrencies, feel free to read our ‘What is Cryptocurrency?’ guide, which offers a more extensive explanation.
Given blockchains can now govern digital money supplies, major companies have sought to extend this technology further to other types of financial services.
As such, it’s believed blockchains could solve inefficiencies in parts of the financial system – inter-bank transactions, clearing and settlements – that have typically been the domain of some of the world’s largest and most opaque financial entities.
The idea is these institutions can use blockchain technology to cut costs, better adhere to regulation and generally upgrade the somewhat antiquated technology that helps them run.
One of the most talked about use-cases for blockchain technology is using it to manage supply chains for businesses.
Global trade is a trillion dollar industry, with goods and services being shipped across the world daily. In order for something to travel from one place to the next, there are multiple supply chain participants, each relying on different systems to approve and process transactions.
Blockchain technology could help reduce the barriers formed from these different systems, removing certain costs and potential points of failures along the way.
Records today, be it health care, real estate or voting, are often maintained by centralized data centers, which brings added costs and risks to the entities entrusted with them.
By nature, this means that information is vulnerable to security breaches and can be difficult and expensive to access.
Many industries need a more efficient and secure system for managing these records while performing and recording other complex transactions.
This is where blockchain technology comes in, and there is some hope it could help solve these long-standing issues, offering a mechanism for recording and maintaining comprehensive records while allowing individuals to have more control over their own data.
Since the 2009, and the inception of Bitcoin, blockchain technology has been the driving force behind a variety of different projects.
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