What is Blockchain Technology? And How it Works?

Blockchain technology

The groundbreaking database technology known as blockchain is what powers almost all cryptocurrencies. Blockchain makes it incredibly difficult to attack or play the system by dispersing an exact copy of a database throughout an entire network. Although cryptocurrency is now the most prominent application of blockchain technology, the technology has the potential to be used for a broad range of purposes.

What is blockchain technology?

A blockchain is described as “a distributed database that stores a continually growing list of ordered entries, called blocks,” and these blocks “are linked using encryption. Each block has a timestamp, a cryptography hash of the previous one, and transaction details. A blockchain is a decentralized, distributed, and open digital ledger that is utilized to log transactions across numerous computers in a way that prevents the record from being changed retrospectively without changing all succeeding blocks and obtaining network consent.

So, what is blockchain?

Blockchain, at its heart, is a distributed digital record that stores all types of data. A blockchain can store information on digital currencies, NFT property, or Defi intelligent contracts.

Although this type of data can be stored in any traditional database, blockchain is unique because it is entirely decentralized. Imagine a Spreadsheet or a banking database, but instead of being kept in one place by a single administrator, a blockchain database is held on numerous identical copies on multiple machines dispersed throughout a network. Nodes are the collective name for these distinct computers.

How does Blockchain Work?

The name “blockchain” is not by chance: The digital ledger is sometimes depicted as a “chain” made up of distinct data “blocks.” A new “block” is made and attached to the “chain” each time new data is introduced to the network regularly. To achieve this, all nodes must update their copies of the blockchain database to match one another.

The key reason why blockchain is seen as being extremely safe is how these new blocks are formed. Before a new block is added to the ledger, many nodes must verify and affirm the validity of the new data. They might ascertain whether recent transactions in a block are genuine or that coins have been used only once for a cryptocurrency. Unlike isolated databases or spreadsheets, where one man can make updates without supervision, this system requires collaboration.

C. Neil Gray, an associate in Duane Morris LLP’s fintech practice areas, explains that after a consensus has been reached, the block is inserted into the chain, and the fundamental transactions are stored in the distributed network. From the start of the ledger until the present, “blocks are safely linked together, producing a secure digital chain.”

Typically, cryptography is used to safeguard transactions; thus, complex mathematical equations must be solved for nodes to complete a transaction.

According to Sarah Shtylman, a fintech and blockchain counsel at Perkins Coie, “as a reward for their work in certifying amendments to the shared data, miners are often rewarded with new quantities of the blockchain’s native currency—for example, fresh bitcoins on the bitcoin blockchain.

Difference between public blockchains vs. private blockchains

Blockchains can be public or private. Anyone can participate in a public blockchain, which means they can read, write, or monitor the information stored on it. Notably, since no single entity controls the nodes, changing transactions recorded in a public blockchain is impossible.

In contrast, a private blockchain is managed by a company or group. It has the power to go back and change the blockchain, and it is the only one that can select who gets admitted to the system. Except for being distributed over numerous nodes to improve security, this private blockchain procedure is comparable to an internal data storage system.

How are blockchains being used?

Blockchain technology is used for various purposes, from managing voting systems to providing financial services.

For banking

Blockchain is being utilized to carry out payments in fiat currency, such as dollars and euros, in addition to cryptocurrencies. Due to speedier transaction verification and processing outside of regular business hours, this may be quicker than sending funds through a bank or another financial institution.

In cryptocurrency

The most widely utilized technology at the moment is blockchain, which serves as the basis for cryptocurrencies such As bitcoin or Ethereum. A blockchain keeps track of all cryptocurrency purchases, exchanges, and expenditures. The more cryptocurrency users there are, blockchain technology may become commonplace.

Cryptocurrencies are still not widely used to purchase products and services because of their volatility. The availability of digital asset services to retailers and vendors is expanding. Thanks to companies like PayPal, Square, and other financial service organizations.

Smart contracts

Smart contracts, also known as self-executing contracts, are another blockchain innovation. Once specific requirements are met, these digital contracts take effect automatically. For instance, after the seller and the buyer have satisfied all requirements for an agreement, a payment for an item may be immediately released.

Smart contracts, which automate legal contracts using blockchains and written instructions, have a lot of potential, according to Gray. “A well-drafted smart legally enforceable contract on a shared database can decrease, or preferably eliminate, the need for external entities to check performance.”


Experts are investigating how to use blockchain to stop voting fraud. Blockchain voting would make it unnecessary for individuals to physically gather and validate paper ballots by allowing voters to cast votes that couldn’t be tampered with.

The conclusion

Blockchain technology is still a unique technology despite its potential. Gray believes that blockchain technology has the potential to be employed in additional contexts, but that depends on future governmental regulations. It is still being determined when and whether authorities such as the SEC will intervene. The objective would be to safeguard markets and investors. That much is clear, he says.

Shtylman compares blockchain to the early days of the internet. Before Google and Facebook had their first iterations, the internet had been around for nearly 15 years. However, it’s challenging to anticipate where blockchains will go in another ten or fifteen years. Still, they will fundamentally alter how we transact and communicate with one another in the future, much like the internet.            

While there are still obstacles, such as transaction restrictions and energy costs, investing in blockchain-based projects may be worthwhile for investors who recognize the technology’s promise.

While there are still obstacles, such as transaction limits and power costs, investing in blockchain-based projects may be worthwhile for investors who recognize the technology’s promise. Feel free to contact us to learn more about how you can build your first blockchain-based project.


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