Slide 3: What is Blockchain?Define blockchainMention its decentralized and distributed natureEmphasize its security features

Slide 3: What is Blockchain?

1. Definition of Blockchain: Blockchain is a type of database that stores information in blocks that are chained together. It is a digital ledger of transactions that is duplicated and distributed across the entire network of computer systems on the blockchain.

2. Decentralized and Distributed Nature: Unlike traditional databases, blockchain is decentralized and distributed across a network of computers, called nodes. This means that no single entity has control over the entire chain, and everyone in the network can verify and view the transactions.

3. Security Features: Blockchain is highly secure due to its cryptographic and algorithmic methods. Each block contains a cryptographic hash of the previous block, a timestamp, and transaction data. This makes it resistant to modification of the data. Once the data is recorded, it cannot be altered retroactively. This feature, along with the decentralized nature of the blockchain, makes it highly secure and reliable.