Before moving on to the types of Blockchain, let us first understand what blockchain is;
A blockchain is a ledger of records, called blocks, which are linked using cryptography. Each block contains a cryptographic hash of the previous block, a timestamp and transaction data. A blockchain is resistant to data tampering by design.
It is “an open, distributed ledger that can record transactions between two parties efficiently and in a verifiable and permanent way.” A blockchain is generally administered as a distributed ledger by a peer-to-peer network that follows a protocol for inter-node communication and verifying new blocks. The data in any particular block cannot be changed retrospectively without affecting all following blocks, which necessitates network majority cooperation.
The four types of blockchain are as follows;
A private blockchain is the most restricted type of blockchain access. The use of this type of blockchain is controlled by an organization, organization chart or individual person. This type of blockchain gives users an overall view only, and they are unable to see any transaction details.
Private blockchains are typically used by large corporations (such as banks) that handle sensitive data and do not want their competitors to view the information stored in their ledgers. Information stored on private blockchains cannot be viewed without permission from an authorized person within the company.
Private blockchains are much like intranets in the early days of the internet. They were often used internally (within companies) to provide secure access to information that was not made available via the World Wide Web until years later.
A private blockchain is a centralized network in most cases so;
Public blockchains are permissionless, meaning that anyone with an internet connection can join the network as a node, for example Bitcoin and Ethereum. Public blockchains are open-source projects, meaning that anyone can submit code changes or additions to their codebase. There is no single person or group in charge of the main code repository or protocol rules.
A public blockchain may operate under a centralised group of developers according to its white paper, but ultimately it is controlled by the consensus of its users.
Public blockchains are the most popular form of blockchain due to their availability, ease of use and open-source nature. Public blockchains are often used for cryptocurrencies based on their decentralised nature.
These cryptocurrencies are usually created through a process called “mining“, where nodes on the network are rewarded new cryptocurrency for solving complex mathematical equations. However, not all public blockchains are used for cryptocurrencies, some public chains exist to provide alternative transactional functionality to existing financial services, such as smart contracts or programmable money like Ethererum.
Public blockchains are also referred to as “permissionless” because there is no access control mechanism within the protocol itself. Anyone with an internet connection can download and run a node on a public blockchain, which enables them to interact with other nodes
In a consortium blockchain network, there are several “nodes” or “members” in the network. Those members set up a peer-to-peer network, which is used to validate transactions and ensure that records of transactions are accurate and permanent. The blockchain also reduces the need for third-party intermediaries since the parties involved in a transaction can verify each other directly through their computers.
The consortium blockchain is an effective solution when a number of related businesses want to work together to keep a shared ledger, but they don’t necessarily trust each other. For example, when multiple companies in a supply chain have to track goods from beginning to end, it may be more efficient to create a shared blockchain instead of setting up independent blockchains for each business involved in the process.
Hybrid blockchain can be defined as a combination of permissioned and permissionless blockchains. Hybrid blockchains are primarily open to known entities but still offer some censorship resistance. Also, they permit some degree of anonymity by design.
A hybrid blockchain is a blockchain wherein the consensus mechanism is not proof of work or proof of stake. Currently, most blockchains are based on proof of work (PoW) or proof of stake (PoS), and there are multiple other types of consensus mechanisms. These include:
A hybrid blockchain can be seen as a combination of two different blockchains: one blockchain with PoW and another blockchain with PoS. The first blockchain is there to protect the network from 51% attacks, while the second blockchain serves as a governance layer for protocol upgrades and decisions. This way, the miners do not hold too much power over the network’s future direction.
There are different types of Blockchain technology, each with different benefits. When creating a new Blockchain project, it important to decide which type to use.
The blockchain is one of the marvels of modern computing. It has the potential to disrupt many industries and change the way we do business forever.
Developers need to create standards on which blockchains can communicate with each other and non-blockchain services. And businesses will need to decide whether they want to invest in blockchain technology or stick with tried-and-true approaches.
The challenge for businesses is deciding when and where blockchain technology is best suited to their needs. Because blockchain offers significant advantages over conventional databases, it’s best suited for applications that require:
High security: Blockchain data is encrypted and therefore protected against tampering and revision.
Some degree of anonymity: For many people, there’s value in keeping their identities private – whether they’re protecting themselves from government intrusions or simply keeping their personal lives separate from their business transactions.
A high degree of trust between users: If every member of a network is constantly worried about being cheated, no one will participate or the system will collapse.
In many cases, blockchain isn’t a better option than existing technologies. A centralized database might be sufficient for simple identification tasks.
Blockchain technology is more than just a buzzword. It has the potential to revolutionize many of the Internet’s most popular services and change how we exchange money, but it’s still in its infancy.
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Here are some frequently asked questions on the types of blockchain;
Some of the best use case examples for blockchain are:
Blockchain is essentially the underlying tech that supports cryptocurrencies.
In distributed ledgers, the entries take place without any third-party involvement. After those records are written into the distributed ledgers, they cannot be altered. Hence, until the ledgers are distributed, it is not possible to tamper with those records.
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