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What is blockchain & how does it work?

Just as the internet is a technology that facilitates the digital flow of information, blockchain is a technology that facilitates the digital exchange of units of value. Anything from currencies to land titles to votes can be tokenized, stored, and exchanged on a blockchain network.

What is a public blockchain?

A public blockchain, also known as an open or permissionless blockchain, is one where anybody can join the network freely and establish a node. Because of their open nature, these blockchains must be secured with cryptography and a consensus system like proof of work (PoW).

Are blockchains open-source?

Most blockchains are entirely open-source software. This means that everyone can view its code. This gives auditors the ability to review cryptocurrencies like Bitcoin for security. However, it also means there is no real authority on who controls Bitcoin’s code or how it is edited.

Can blockchain be used for illicit transactions?

The most cited example of blockchain being used for illicit transactions is probably the Silk Road, an online dark web illegal-drug and money laundering marketplace operating from February 2011 until October 2013, when the FBI shut it down.

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