• Shraddha Yogesh Garg

Every completed transaction or digital event that has been shared by involved parties is recorded in the blockchain, a distributed database. Most users of the system confirm each transaction. It contains all of the transaction records. The most popular cryptocurrency and blockchain example is called Bitcoin. When "Satoshi Nakamoto" or a group of people going by that name released a white paper titled "BitCoin: A peer-to-peer electronic cash system" in 2008, blockchain technology first came to be known. Blockchain technology makes transactions incorruptible by storing them in a distributed digital ledger. A transaction involving anything of value, such as real estate, cars, and other goods, can be recorded on Blockchain. Blockchain could be a data structure composed of a growing collection of block data representations. The knowledge blocks cannot be taken out or changed because they are interconnected. One cryptocurrency that utilizes blockchain technology is called BitCoin. Transparent information can be transferred throughout a firm network thanks to a sophisticated database technique called blockchain technology. In a blockchain database, information is kept in blocks that are connected to one another in a chain. The data is constant in terms of time since it requires network consensus to remove or modify the chain. Thus, you can use blockchain technology to establish an unchangeable or immutable ledger to record orders, payments, accounts, and other transactions. The system has built-in safeguards that guard against unauthorised transaction submissions and maintain consistency in the shared view of these transactions.

Keywords: Blockchain, Cryptocurrancy, Bitcoin, Distributed database, Network.

"A STUDY OF SECURITY IN BLOCKCHAIN TECHNOLOGY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.11, Issue 5, page no.a480-a488, May-2024, Available :http://www.jetir.org/papers/JETIR2405059.pdf

"A STUDY OF SECURITY IN BLOCKCHAIN TECHNOLOGY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.11, Issue 5, page no. ppa480-a488, May-2024, Available at : http://www.jetir.org/papers/JETIR2405059.pdf