CompTIA Security+ Certification SY0-601: The Total Course - Chapter 2 Ask Me Anything (AMA)

The video begins with a discussion on the fascinating aspects of cryptography and its control. Ian then asks about blockchain, public ledgers, and cryptocurrency. Dan explains that blockchain is a decentralized ledger of transactions, often associated with cryptocurrencies like Bitcoin and Ethereum. He emphasizes that blockchain is not limited to cryptocurrencies but also supports smart contracts and other applications. The explanation covers how blockchain ensures transaction integrity through hashing and its decentralized nature, involving thousands of computers worldwide.

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