Introduction
Blockchain is one of the biggest tech stories of the last decade. Everyone seems to be talking about it – but underneath the superficial discussion, it’s not always clear what blockchain is or how it works. Although blockchain has a reputation for being difficult to understand, the basic concept behind it is very simple. It has great potential to change the business from the bottom up.
Blockchain is a technology that provides secure sharing of information. Obviously, the data is stored in a database. Transactions are recorded in ledgers called ledgers. A blockchain is a distributed file or ledger (one of the technologies used today), meaning that the power to modify the blockchain is distributed among nodes or those involved in public or private computer networks. This is called distributed ledger technology (DLT). Nodes are backed by tokens or currencies to update the blockchain.
Blockchain allows for stable, immutable, and transparent data collection and transactions. In turn, this makes it possible to exchange anything of value, whether material or intangible.
Blockchain has three foundations. First, the blockchain database must be cryptographically secure. This means you need two encryption keys to access or add information to the file: the public key, which is the address of the file, and the Private key, which is the private key that must be validated by the database, and network. Next, a blockchain is a digital ledger or database of transactions. That is, everything happens entirely online.
Finally, a blockchain is a database shared over a public or private network. One of the most famous public blockchain networks is the Bitcoin blockchain. Anyone can open a Bitcoin wallet or become a node on the network.
Other blockchains may be private networks. It is more suitable for banks and fintechs where you need to know exactly who is involved, who has access to the data, and who has the private key to the database. Other types of blockchains include consortium blockchains and hybrid blockchains that combine different aspects of public and private blockchains.
According to a study by the McKinsey Technology Council, up to 10% of global GDP could be related to blockchain-based transactions by 2027. But what is real and what is exaggerated in the blockchain world? And how can businesses use blockchain to improve efficiency and create value? Read on to find out.
How does blockchain work?
You may have information or knowledge about blockchain as blockchain is similar in that it is a database where data is accessed and stored. But the main difference between traditional data or spreadsheets and blockchain is how data is organized and accessed.
Blockchains are made up of programs called scripts that do what you would normally do in a database: access and access data and save and store it somewhere. A blockchain is distributed, meaning multiple copies are registered across multiple systems, and everything must match for it to be valid.
Blockchain records transactions and enters them into a block, such as a cell in a spreadsheet containing information. When the data is full, it is run through a cryptographic algorithm that generates a hexadecimal number called a hash. Then enters the hash in the block header following it and encrypts it with the other data in the block. This will create a series of interconnected blocks.
Transaction Flow
Transactions follow a specific flow depending on the blockchain where the transaction takes place. For example, on Bitcoin’s blockchain, if you initiate a transaction using a cryptocurrency wallet (an application that interfaces to the blockchain), it will initiate a chain of events.
In Bitcoin, your transaction is sent to the mempool where it is stored and programmed until a miner or user retrieves it. When it enters a block and the block is filled with transactions, it is locked and encrypted using a cryptographic algorithm. Then mining begins.
The entire network works simultaneously and tries to “crack” the hash. Except for “Nonce” (short for one-time use number), each generates a random hash.
Every miner starts with zero nonce added to the hash they generate. If this number is not less than or equal to the target hash, the value 1 is added to the nonce, and a new block hash is generated. This continues until the miner generates a valid hash rate, wins the game, and receives a reward.
The transaction is complete when the block is closed. However, a block is not considered confirmed until 5 other blocks have been confirmed. On average, it takes less than 10 minutes per block, so it takes about an hour for the network to confirm (the first block with transactions and the next 5 blocks multiplied by 10 will take about 60 minutes).
Not all blockchains follow this process. For example, the Ethereum network randomly selects one validator out of all users who have ether to validate a block, which is then validated by the network. This is much faster and less energy intensive than the Bitcoin process.
Blockchain Decentralization
Blockchain allows information in a database to be distributed among multiple network nodes (computers or devices running blockchain software) in multiple locations.
This not only creates redundancy but also maintains data accuracy. For example, if someone tries to change the data in one instance of the data, other nodes will prevent this from happening. In this way, none of the networks can change the data held in it.
Because of this distribution – and cryptographic proof of work – information and history (including cryptocurrency transactions) are irretrievable. Such information may be the name of a business (such as the use of cryptocurrencies), but blockchains may also hold various information such as legal contracts, country ID or company stock.
Blockchain Transparency
Due to the interaction of the Bitcoin blockchain, all transactions can be seen transparently, either by having a personal identity or by using a blockchain explorer that allows anyone to print transactions in a timely manner. Each node has its own copy of the chain, which is updated as new blocks are confirmed and added. This means you can track bitcoins anytime, anywhere.
For example, the stock market was hacked, resulting in the loss of a large number of cryptocurrencies. While hackers can be anonymous – apart from their wallet address – the cryptocurrency they withdraw can be easily traced because the wallet address is published on the blockchain.
Of course, information stored on the Bitcoin blockchain (and many other blockchains) is encrypted. This means that only those who are addressed can reveal themselves. Thus, blockchain users can remain anonymous while maintaining transparency.
HISTORY OF BLOCKCHAIN
In 1991, researchers Stuart Haber and W. Scott Stornetta described blockchain technology. They want to know the solution to timestamp digital data so they cannot be retrieved or tampered with. They created a system that uses the concept of a cryptographically secure blockchain to store real-time data.
In 1992, Merkle Trees was introduced to make blockchains more efficient by allowing more data to be stored in a single block. Merkle trees are used to create “secure blockchains”. It keeps records, each record is linked to previous records. The latest information in this chain includes the history of the entire chain. But nobody cared about the technology, and the patent expired in 2004.
In 2004 computer scientist and cryptography expert Hal Finney introduced a system called Reusable Proof of Work (RPoW) as a standard for cash. This is an important early step in the history of cryptocurrencies. The RPoW system works by accepting non-modifiable or immutable Hashcash-based proof-of-work returns, generating an RSA-signed token that can be extended from person to person.
RPoW solves the problem of double spending by registering ownership of tokens on a trusted server. This server is designed to allow users around the world to timely verify its accuracy and completeness.
Also in 2008, Satoshi Nakamoto explained the distributed blockchain theory. He uniquely improved the design by adding blocks to the original chain without having to be signed by a trusted party. The modified tree will contain the security history of the data exchange.
It uses a peer-to-peer network to sign and verify all transactions. He is self-directed and does not need to have a major role. These developments are very beneficial and make blockchain the backbone of cryptocurrencies. Today, the creator works as a public ledger for all transactions in the cryptocurrency space.
Blockchain development is stable and progressive. The words block and chain were used separately in Satoshi Nakamoto’s original writings, but it eventually became the one-word “blockchain” in 2016. From 20 GB to 100 GB.
What is Blockchain Security?
Let’s start by recalling the blockchain itself and what it is. Blockchain is a distributed ledger technology (DLT) designed to create trust and confidence in the environment. A blockchain is a decentralized accounting system that is replicated and distributed across a network of computer systems. It provides access to information to any designated node or participant who can record, share and view encrypted transaction data on the blockchain.
Blockchain technology collects and stores information in groups, also called “blocks,” and each block can contain a certain amount of data. When a block reaches its capacity, it is combined with the previous full block to create a chain of data, hence the clever name “blockchain”.
Blockchain Security is a complete risk management solution for blockchain networks that combines security services, cybersecurity frameworks and best practices to reduce the risk of fraud and cyberattacks.
Blockchain technology’s data model has security features as it is based on the principles of consensus, cryptography and decentralization. Each new block of data is tamper-proofly linked to all previous blocks.
In addition, all changes in the block are verified and approved by the consensus (authorized users) to ensure that all changes are correct and correct. Therefore, there is no point of failure where users cannot make changes. But blockchain security goes beyond even static security.
What types of blockchains are there? Before explaining how Blockchains provide security, we should point out different types of blockchains, each with unique challenges.
Private Blockchain
Private blockchain networks require an invitation. Users must be authenticated by a central administrator or network administrator, or through a process created by the network administrator. Businesses using private blockchains often create a permissioned network. Licensing networks limit who can join the network and the type of business they can start. In all cases, participants will need an invitation or permission to participate.
Private blockchains typically use a Proof of Contract (PoA) authentication method and are often used to perform tasks such as access, validation, and information storage in internal, secure business environments. Business information is generally confidential.
Public Blockchain
Public Blockchain focuses on participation and transparency. Transaction consensus is “decentralized”. This means that anyone can participate in verifying network transactions, and the software code is open source and available to the public (e.g. Bitcoin and Ethereum).
A key feature of public blockchain networks is decentralization through a crypto-economy designed to enable cooperation in a decentralized network. In a public blockchain, this means that there are no political centers of control in the network and no architecturally-centric points of failure in the design of software systems.
The degree of decentralization of a blockchain depends on the design of the consensus algorithm, the management of the network, the ownership of cryptographic “private keys” and the financial support provided. For example, consider the concept of “data mining” where users earn cryptocurrencies using transactions. This award encourages people to network and participate in job recognition.
Governance decisions include who develops the software code, who can work on the contract, and who can participate in the public administration that manages the network. The public blockchain consensus mechanism is usually in the form of “Proof of Work” (PoW) or “Proof of Stake” (PoS).
However, in terms of access rights, anyone can join and verify transactions, which is the main difference between public and private blockchains.
Consortium blockchain
Usually, when talking about blockchain, only public and private blockchains are mentioned. But there is a third option: integration. Consortium blockchains have known participants with prior consent from a central authority to join the consensus on the blockchain network.
This “semi-permissioned” approach allows the network to be distributed or partially distributed, but still maintains some degree of control over it. Meanwhile, the information exchanged on the chain can be kept confidential.
Consortium chains can reach consensus through “Proof of Work” (PoW), “Proof of Authority” (PoA), or “Proof of Stake” (PoS). There are also other methods available, such as proof of stake. Consortium blockchains are best used by two parties, business, supply chain management, or Internet of Things (IoT) applications.
6 Blockchain Security Examples
Here are some examples of how companies and organizations can ensure blockchain security.
1- Mobile coin
This California-based cryptocurrency company develops secure and convenient cryptocurrencies for businesses that cannot afford to implement ledger security measures on their own. The Mobilecoin cryptocurrency replaces third-party transaction providers by encrypting all transaction data at both ends. This product works with Facebook Messenger, WhatsApp and Signal.
2- Coinbase
This is another cryptocurrency company based in California. Coinbase is an exchange for trading digital currencies. Coinbase works entirely on encryption by storing wallets and passwords in a secure file. Employees must pass a background check to secure cryptocurrencies.
3- JP Morgan
JP Morgan is one of the largest and most popular banks in the United States. He created a business-friendly version of ethereum called Quorum that uses blockchain technology to make transactions private. JP Morgan uses smart contracts on the Quorum Group network to create transparent yet cryptographically guaranteed transactions.
4- Lockheed Martin
US defense contractor is the first to use blockchain security. Lockheed Martin is working with cybersecurity firm Guardtime Federal to develop blockchain cybersecurity protocols for systems engineering, software development and risk management. Lockheed Martin aims to use blockchain to secure every step of the weapons development process.
5- Cisco
The California-based tech giant believes that Blockchain is the best for the Internet of Things (IoT) because the proof of technology eliminates any malfunctions and prevents important private information through encryption. This concept is important because the Internet of Things is growing steadily. If blockchain technology becomes the IoT network of choice, this will increase the popularity and use of blockchain. Of course, it doesn’t hurt to have a big IoT player!
6- Hashed Health
Tennessee-based healthcare innovation company seeks to help the healthcare industry embrace blockchain technology. The company is made up of Hashed Collective, Hashed Enterprise, and Hashed Labs, each focused on a different aspect of blockchain. Hashed Health has partnered with many hospitals and healthcare companies to create a secure digital blockchain network for sharing patient information and confidential internal communication channels.
How can businesses benefit from blockchain?
Research shows that blockchain and distributed ledger technology can create new opportunities for business by reducing risk and compliance costs, creating value, supporting automation and secure employment contracts, and building a strong network. Let’s go further:
- Mitigate risk and reduce compliance costs.
Banks rely on Know Your Customer (KYC) processes to attract and retain customers. But many existing KYC processes are outdated and cost each bank about $500 million a year. New DLT systems will require one KYC verification per customer to be efficient, reduce costs, and improve transparency and customer experience.
- Cost-effective deals
Digitizing and listing the information will help you save a lot of time and money. For example, in their letter of exchange of credit, the two companies selected non-paying notes and exchanged nearly $100,000 worth of butter and cheese using blockchain. Therefore, a process that used to take about 10 days has been reduced to less than four hours from issuance to approval of the letter of credit.
- Automatic and secure contract execution
Smart contracts are instructions entered into tokens outside the blockchain, which can be executed under certain conditions. These assist in the automatic execution of contracts.
For example, a vendor wants to simplify supply chain management, so they are starting to document all processes and actions from suppliers to customers and have them translated into smart contracts on the blockchain. The process not only facilitates more secure tracking of the source of food but also requires less human work and improves the capacity to track lost items.
How are blockchain, cryptocurrencies and decentralized finance connected?
The blockchain allows buyers and sellers to trade cryptocurrencies online without the need for banks or other intermediaries. All digital assets, including cryptocurrencies, are based on blockchain technology.
Decentralized Finance (DeFi) is a set of applications in cryptocurrencies or blockchain that aims to transform the existing financial system with services based on smart contracts. Like blockchains, DeFi applications are decentralized, meaning anyone with access to the application can control changes or additions to the application. This means users will have direct control over their money.
What are the concerns about the future of blockchain?
While Blockchain could change the rules of the game, doubts arose about its true market value. A big problem is that for all concept-level use cases, hyperbolic titles, and billions of dollars in investments, there are still very few practical, scalable use cases for blockchain.
One of the reasons is the result of technological competition. For example, blockchain isn’t the only fintech impacting financial results in payments – 60% of the roughly $12 billion invested in US fintech in 2021 is focused on payments and lending. Given the complexity of blockchain solutions and the fact that simple solutions are often best, blockchain may not be the only solution for payments.
Looking ahead, some see the value of blockchain in data freedom, enabling collaboration, and applications that solve certain problems. McKinsey research suggests that it is these specific applications where blockchain, not financial services, has the most potential.
Mubashir Ahmed is a multifaceted market analyst with extensive knowledge of the blockchain industry. He is proficient in market analysis and blockchain technology, having had experience with numerous projects in the space. He has a deep understanding of the Cryptocurrency industry, its trends, and how to best approach investing in it.
