International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 07 Issue: 08 | Aug 2020 www.irjet.net p-ISSN: 2395-0072 © 2020, IRJET | Impact Factor value: 7.529 | ISO 9001:2008 Certified Journal | Page 2395 SECURE BANK TRANSACTION USING BLOCKCHAIN Swathi H.C 1 , Dr. H.P Mohan Kumar 2 1 Student, Dept. of MCA, PES College of Engineering, Mandya, Karnataka, India 2 Professor, Dept. of MCA, PES College of Engineering, Mandya, Karnataka, India ---------------------------------------------------------------------***---------------------------------------------------------------------- Abstract - Blockchain is a modern technique that enables transactions between parties simpler and safer. Most frauds now threaten the banking sector. The key goal of this work is to resolve banking transaction difficulties. As the current team can automatically traverse the network, it can focus on one point which is the server computer. The database server infrastructure would be removed and the information decentralized through the blockchain to minimize the possibility that a server will be compromised. We use SHA256 algorithm to generate 256-bit unique hash value and proof of work consensus algorithm to generate authenticated blockchain. Key Words:Wallet, Public/Private key, Consensus algorithm, SHA256, Proof of Work. 1. INTRODUCTION The key purpose of the proposed program is the creation of a new technology to provide more security for banking transactions. The Blockchain, a platform for the exchange of leader schemes, can be used in a wide number of programmes. Blockchain technology typically has key decentralization, longevity, openness and data authenticity [5]. We provide a specific concept of decentralized conditional confidential payment, acknowledging the value of law, and defining the related safeguard criteria. The platform enhances information management and guarantees effective and secure communication. Confidence is improved when performing banking transactions between parties using Blockchain as it decreases the risk of fraud and creates records of operations automatically. This provides an automatic context tracking of all device users. Blockchain offers transparency because of its decentralized nature and decreases the risk when negotiating a client agreement with a non-known or unknown entity. 2. LITERATURE REVIEW The popularity of blockchain is partially attributable to its decentralizing and anonymous characteristics. The framework holds the history of transactions between most nodes in a peer-to‐pair network to avoid "double expenditure." To hold tradition, a consensus-based system called proof of work is used [1]. The different ways and methods in the application of the POW (proof of work) to a blockchain can be regarded as consensus. With this algorithm, different parties decide whether a transaction can be added to the corresponding blockchain or not. It makes it more difficult to solve the cryptographic puzzle, and the total number of leading zero in the cryptographic puzzle can be made more difficult to solve. [2]. How peer-to - peer electronic cash can help users send cash from place to place without involvement of third parties. And the use of Ethereum blockchain was also introduced to the corresponding blockchains network. Explains further how digital signatures and digital certificated organizations help and question the centralized structures that already exist [3]. Compared to a central data storage, Blockchain technology has better privacy security, as the server has no inaccessibility. And if we were to hack the entire blockchain network, we need 51% access to the network, so it can't be done at all. And several active nodes in the open blockchain blockchain network. The encryption token with intelligence string information used. This refers in general to the growth, transfer and storage of cryptocurrencies. The cryptographic token refers generally to the data string which actually shows the information with the first data. [4]. The work must be checked successfully by all nodes of the network to act as proof-of - work for cryptocurrencies. The primes, such as record breaks, should not be too that. It then precludes Mersenne primes and results in the use of the main chain as the function of the primary coin, since it is exponentially harder to locate the primary chain (with our present theoretical and algorytic understanding) [6]. 3. PROPOSED METHODOLOGY Blockchain technology refers to any electronic exchange of digital properties. This technology is used in this case to ensure safe banking transactions. blockchain is a decentralized distributed ledger, making it easy to verify all transactions and preventing any backup of the ledger from being updated. Fig(1) demonstrates transactions conducted in blockchain technology.