ERSTECH

Blockchain is a decentralized digital ledger that is used to record and store data in a secure and transparent manner. It is a distributed database that is managed by a network of computers rather than a single central authority. Each block in the chain contains a unique digital signature, known as a hash, which verifies the integrity of the data in that block. Once a block is added to the chain, it cannot be altered or deleted without invalidating the entire chain. This creates a tamper-proof system that is resistant to hacking and fraud. Blockchain technology was initially created to support the digital currency, Bitcoin, but it has since been adopted by many other industries for its ability to provide secure and transparent record-keeping. It has the potential to revolutionize a wide range of industries, including finance, healthcare, and logistics, among others. There are three main types of blockchain: public, private, and consortium. Here's an overview of each type: Public B