• Ravinder Singh Adhikari
• Rohit Singh Aswal
• Prabhjot Kaur

This paper reviews the understanding of cryptocurrencies as well as the blockchain technology that led to the popularization of cryptocurrencies across the world. Cryptocurrency, as the name suggests, is a digital currency that uses a distributed peer-to-peer network and advanced encryption techniques called cryptography. This cryptocurrency is built upon the blockchain technology, which is a distributed ledger that contains the record of all the past transactions in a block. This is accomplished using mining. Mining includes the use of strong cryptographic algorithms that makes the transactions more secure and robust. This is done by miners to validate the transactions before it is added to the blockchain by solving the complex mathematical puzzle. Miners are then rewarded cryptocurrency coins for successfully mining the mathematical puzzle. This paper systematically reviews the types of cryptocurrencies used worldwide and also explicitly states the advantages and threats arising out of cryptocurrencies.

Keywords: Cryptocurrency, Blockchain, Mining

"Retrospective Study of Cryptocurrency Trends", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.215-220, May-2019, Available :http://www.jetir.org/papers/JETIR1905227.pdf

"Retrospective Study of Cryptocurrency Trends", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp215-220, May-2019, Available at : http://www.jetir.org/papers/JETIR1905227.pdf