• Sweety Bakyarani. E

Blockchain became a sensation overnight with the introduction of Bitcoin in 2008. Satoshi Takemoto the father of blockchain described Bitcoin as a “purely peer-to-peer version of electronic cash”. Since then there has been no turning back for Blockchain. It has become the go to technology for decentralized and transactional data sharing across a large network of untrusted participants. It has introduced a different forms of distributed software architectures, where agreement on shared states can be established without trusting a central integration point. It helps in creating a decentralized environment, where transactions can happen without the interference of third-party organization. Every transaction is recorded permanently in a public ledger that is verifiable, transparent and secure. This is precisely one of the reasons for the Blockchains popularity. It has the potential for achieving groundbreaking changes in varied sectors ranging from finance, manufacturing sector, education and health care. This paper presents an overview of blockchain technology covering its history, architecture, also highlighting the challenges currently faced by the technology. A brief discussion on the algorithms used in blockchain-based systems and future directions of the blockchain technology is also presented.

BlockChain, Decentralize, Consensus Algorithms

"An Overview of Blockchain Architecture", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.190-196, June 2019, Available :http://www.jetir.org/papers/JETIR1906W24.pdf

"An Overview of Blockchain Architecture", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp190-196, June 2019, Available at : http://www.jetir.org/papers/JETIR1906W24.pdf