T. Suganya et al.; International Journal of Advance Research, Ideas and Innovations in Technology © 2019, www.IJARIIT.com All Rights Reserved Page | 161 ISSN: 2454-132X Impact factor: 4.295 (Volume 5, Issue 2) Available online at: www.ijariit.com Decentralized secure money transfer using blockchain Suganya T. suganya.t@skct.edu.in Sri Krishna College of Technology, Coimbatore, Tamil Nadu Vignesh A. skct.15tucs250@gmail.com Sri Krishna College of Technology, Coimbatore, Tamil Nadu Vignesh Kumar N. 15tucs251@skct.edu.in Sri Krishna College of Technology, Coimbatore, Tamil Nadu Vivin Kumar D. 15tucs260@skct.edu.in Sri Krishna College of Technology, Coimbatore, Tamil Nadu ABSTRACT A block chain is just a chain and a list of blocks. Each block, in the block chain, will have its own digital signature. Each block doesn’t just contain the hash of the block, but its own hash in part, calculated from the previous hash Calculating and comparing the hashes allow us to see if a block chain is invalid. We create a system that Allows users to create wallets and Provides wallets with public and private keys using Elliptic-Curve cryptography. Secures the transfer of funds, by using a digital signature algorithm to prove ownership and finally allow users to make transaction your block chain Keywords— Blockchain, Netbeans, MySql 1. INTRODUCTION Block-chain is the backbone Technology of Digital Crypto- Currency Bit-coin. The block-chain is a distributed database of records of all transactions and digital events that have been executed and shared among the participating users. Each transaction is verified by the majority of participants of the system. It contains, every single record of each transaction. Bit coin is the most popular crypto-currency an example of the block-chain. The bitcoin is a crypto-currency and it is used to exchange digital assets online. Bit-coin uses cryptographic proof instead of third-party trust for two parties to execute transactions on the internet. Each transaction protects through digital signature. There is no Central Server or System which keeps the data of Block-chain. The data is distributed over Millions of Computers around the world which are connected with the Block-chain. This system allows checking of Data as it is present on every Node and is publicly verifiable. A block is a data structure that contains all the necessary metadata about the block (Block Header) itself and contains the transactions. The first block in a block-chain is called genesis block. The Block chain may be defined as a chain of the block that contains the information. This technique is intended to timestamp digital documents so that it's not possible to backdate them or temper them. The block chain is used for the secure transfer of items like money, property, contracts, etc without requiring a third-party intermediate like bank or government. Once the data is recorded inside a block chain, it is very difficult to change it. Block chains could not be run without the Internet. The node is a computer connected to the Block-chain Network. A chain of blocks that contains some metadata about the block, some transactions and joined to the block by the previous block’s hash value. Node gets connected with Block-chain using the client. Client helps in validating and propagates transaction on to the Block- chain. When a computer connects to the Block-chain, a copy of the Block-chain data gets downloaded into the system and the node comes in sync with the latest block of data on Block- chain. The Node connected to the Block-chain which helps in the execution of a transaction in return for an incentive is called Miners. 2. LITERATURE SURVEY The purpose of this paper is to create a list of blocks each block to connect the previous block to some previous key to connect to find the next key to-do the transaction. V Dinh, Tien Tuan Anh, et al. "Untangling block-chain: A data processing view of block-chain systems. "IEEE Transactions on Knowledge and Data Engineering 30.7 (2018): 1366-1385. This project highlights some public versus private block-chains to create some multiple nodes it is not fully trusted. Some global states are modifying the states. The block-chain is to connect to the previous block-chain. Dinh, Tien Tuan Anh, et al. "Block bench: A framework for analyzing private block chains." Proceedings of the 2017 ACM International Conference on Management of Data. ACM, 2017. This project about the public block chain like some bitcoin and