Blockchain is a digital ledger technology that allows for secure, transparent, and decentralized record-keeping of transactions.
It uses cryptography to ensure the integrity and confidentiality of data, and it is resistant to tampering and modification.At its core, a blockchain is a distributed database that contains a continuously growing list of records, called blocks, which are linked and secured using cryptography. Each block contains a timestamp, a unique cryptographic hash, and a reference to the previous block in the chain, which creates an unalterable record of all the transactions that have been added to the blockchain.
Because blockchains are decentralized, meaning they are not controlled by any single entity or organization, they provide a high level of transparency and security. Once a transaction is added to the blockchain, it cannot be altered or deleted, which makes it ideal for use cases such as cryptocurrencies, supply chain management, digital identity verification, and more.
There are many different types of blockchains, including public blockchains that are open to anyone, private blockchains that are restricted to a specific group of users, and consortium blockchains that are operated by a group of organizations. Each type has its own strengths and weaknesses and is suited to different types of applications.
