A blockchain is a type of shared database that differs from a typical database. It stores information; blockchains store data in blocks linked together via cryptography.
Satoshi Nakamoto is the anonymous group or person that created the first blockchain in 2009. It was originally designed for Bitcoin transactions.
The algorithms work through proof of stake or smart contracts. Some are concerned about its scalability. It can only process 4.6 transactions per second compared to the 65,000 Visa can handle.
The decentralized foundation makes the blockchain secure. Hackers are unable to target and manipulate a single node.
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