You would learn about the underlying technology behind cryptocurrency - the blockchain. This would include understanding the concept of blocks, mining, and the different types of blockchain networks. Blockchain is a data storage technology that makes it difficult or impossible to change, hack, or manipulate data. A blockchain is a network of computer systems that duplicates and distributes a distributed digital ledger of transactions. Each block in the chain contains a number of transactions and each time a new transaction takes place, it is recorded in the ledger of each participant. DLT (Distributed Ledger Technology) is a decentralized database that is administered by a group of individuals. Blockchain is a distributed ledger technology in which transactions are recorded using a hash, a non-changeable cryptographic signature. This means that if one block in a chain is modified, it will affect the entire blocks of the chain. To bring a blockchain system down, hackers would have to change every block in the chain, across all distributed versions. Blockchains like Bitcoin and Ethereum grow in size as more blocks are added, dramatically increasing the security of the ledger.
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