Cryptocurrency? Blockchain investing? Bitcoin? These are all buzzwords that seem like a millennial get-rich-quick scheme, but Blockchain is a technology that could revolutionize the global economy in almost every aspect, from healthcare to politics and thats just the tip of the iceberg.

Whether youre simply looking to invest in Bitcoin, trade some Ethereum, or are just intrigued about what the heck a blockchain actuallyis, youve come to the right place.

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Whileblockchain technology isnt simple when you dig into the nitty-gritty, the basic idea isnt too hard to follow. Its effectively a database thats validated by a wider community, rather than a central authority. Its a collection of records that a crowd oversees and maintains, rather than relying on a single entity, like a bank or government, which most likely hosts data on a particular server. A physical database kept on paper could never be managed by tens of thousands of peers, but thats where computers, and the internet, come in.

Each block represents a number of transactional records, and the chain componentlinks them all together with a hash function. As records are created, they are confirmed by a distributed network of computers and paired up with the previous entry in the chain, therebycreating a chain of blocks, or a blockchain.

The entire blockchain is retained on this large network of computers, meaning that no one person has control over its history. Thats an important component, because it certifies everything that has happened in the chain prior, and it means that no one person can go back and change things. It makes the blockchain a public ledger that cannot be easily tampered with, giving it a built-in layer of protection that isnt possible with a standard, centralized database of information.

While traditionally we have needed these central authorities to trust one another, and fulfill the needs of contracts, the blockchain makes it possible to have our peers guarantee that in an automated, secure fashion.

Thats the innovation of blockchain, and its why you may hear it used to reference things other than Bitcoin and other cryptocurrencies. Though generallynot used for it yet, blockchain could be used to maintain a variety of information. An organization called Follow My Vote is attempting to use it for an electronic voting system thats more secure than modern versions, and healthcare providers might one day use it to handle patient records.

Although blockchain technology has only been effectively employed in the past decade, its roots can be traced back far further. A 1976 paper, New Directions in Cryptography, discussed the idea ofa mutual distributed ledger, which is what the blockchain effectivelyacts as. That was later built upon in the 1990s with a paper entitled How to Time-Stamp a Digital Document.It would take another few decades and the combination of powerful modern computers with the clever implementation with a cryptocurrency, to make these ideas viable.

Data security is failing and there has to be a better system. Blockchain creates a secure, unalterable public record and is poised to dramatically improve the world around you, from voting systems to rental contracts.

In order to validate the blocks in the same manneras a traditional private ledger, the blockchain employs complicated calculations. That, in turn, requires powerful computers, which are expensive to own, operate, and keep cool. Thats part of the reason that Bitcoin acted as sucha great starting point for the introduction of blockchain technology, because it could reward those taking part in the process with something of financial value.

Bitcoin ultimately made its first appearance in 2009, bringing together the classic idea of the mutual distributed ledger, the blockchain, with an entirely digital currency that wasnt controlled by any one individual or organization. Developed by the still anonymous Satoshi Nakamoto, the cryptocurrency allowed for a method of conducting transactions while protecting them from interference by the use of the blockchain.

Although Bitcoin, and alternative currencies, all utilize blockchain technology, they do so in differing manners. Since Bitcoin was first invented it has undergone a few changes at the behest of its core developers and the wider community, and other alt-coins have been created to improve upon Bitcoin, operating in slightly different ways.

In the case of Bitcoin, a new block in its blockchain is created roughly every 10 minutes. That block verifies and records, or certifies new transactions that have taken place. In order for that to happen, miners utilize powerful computing hardware to provide a proof-of-work a calculation that effectivelycreates a number which verifies the block and the transactions it contains. Several of those confirmations must be receivedbefore a Bitcoin transaction can be considered effectivelycomplete, even if to the sender and receiver the Bitcoin is transferred near-instantaneously.

This is where Bitcoin has run into problems in recent years. As the number of Bitcoin transactions increases, the relatively hard 10-minute block creation time means that it can take longer to confirm all of the transactions and backlogs can occur. This has lead to the creation of certain off chain solutions like the Lightning Network, which validate transactions less frequently, to provide faster transactions without slowing the rate of confirmations.

Certain alt-coins, geared towards faster transactions, dont have such a problem with scaling. WithLitecoin its more like two and a half minutes,while with Ethereum the block time is just 10-20 seconds, so confirmations tend to happen much faster. There are obvious benefits of such a change, though by having blocks generate at a faster rate there is a greater chance of errors occurring. If 51 percent of computers working on the blockchain record an error, it becomes near-permanent, and generating faster blocks means fewer systems working on them.

Blockchain technology has a lot of exciting potential, but there are some serious considerations that need to be addressed before we can say its the technology of the future.

Remember all that computing power required to verify transactions? Those computers need electricity. Bitcoin is a poster child of the problematic escalation in power demanded from a large blockchain network using that sort of proof-of-work model. Although exact statistics on the power requirements of Bitcoin are difficult to nail down, its footprint isregularly compared to small countries. Thats not appealing given todays concerns about climate change, the availability of power in developing countries, and reliability of power in developing nations.

Transaction speed is also an issue. As we noted above, blocks in a chain must be verified by the distributed network, and that can take time. A lot of time. As of April 2020, the average confirmation time for a Bitcoin transaction can be anywhere from 10 minutes to several hours, depending on whether you pay a premium transaction fee or not. Ethereum is much more efficient, but its average time is around 15 seconds but even that would be an eternity in a checkout line at your local grocery store. Blockchains used for purposes other than cryptocurrency could run into similar problems. You can imagine how frustrating it would be to wait 15 seconds every time you wanted to change a database entry.

These problems will need to be resolved as blockchain becomes more popular. Still, considering were less than a decade on from the blockchains first implementation, it seems likely that were just seeing the start of adoption for this new idea.

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What Is a Blockchain? | Digital Trends