Cryptocurrencies are digital or virtual currencies based on a cryptosystem. They allow secure online payments without the use of a third party. “Crypto” refers to the various encryption algorithms and cryptographic techniques that protect these entries, such as: B. Elliptic Curve Cryptography, public-private key pairs and hash functions. Blockchain technology is crucial to the appeal and functionality of Bitcoin and other cryptocurrencies. As the name suggests, a blockchain is essentially a series of connected blocks of information in an online ledger. Each block contains a set of transactions that are independently verified by each validator in the network.