Master's Thesis from the year 2018 in the subject Computer Science - IT-Security, , language: English, abstract: E-commerce is the more reputed way to do transactions nowadays and all the onlinetransaction use multicurrency. At present, e-commerce and online trade is the mostpopular way to buy or sell anything and this domain has become a very broad and widearea. These e-commerce and online trading applications are using a different level ofsecurity mechanism and those mechanisms provide some certain level of security. Thesesecurity mechanisms basically depend on third-party authentications using symmetric orasymmetric key cryptography approaches.When using any third party or middlehand to authenticate any transaction still there can be a lot of vulnerabilities since securitycontrol and sensitive data been shared with an external party. As a solution to thissituation block-chain concept was introduced and using this concept, third-partydependencies of an application can be eliminated. Most of the existing online trading application and payment systems have been integratedwith the actual bank and all these bank transactions are always use bank profiles to doany transaction. But using cryptocurrency like bitcoin no need to have a bank profile andit is very fast compared to others. Currently, all the other fiat-currencies has a tendency toinflate and it can be very time dependent but it s very important to find outnoninflationary currency that will be helpful for the stability of the economy. Thissolution mainly based on the bitcoin which is well-organized crypto-currency and peer-to-peer payment method and it has more value-added features than existing walletservices and peer-to-peer payment applications. This application basically focuses on thehigh-security wallet mechanism, wallet restore functionality in any crash or vulnerabilitysituation and also user-friendly application to the user with seamless transaction delaytime. And also this application is open source user creation and any user can create awallet with basic validations and can use for any bitcoin transfer functionalities. Usingthis application user can always check his balances and transaction history at any timeand also this APIs can be integrated with any front-end client since back-end service havebeen implemented as micro-services endpoints. As an end product, this will be an opensource high secure bitcoin wallet application with integration capability with any thirdparty services like a bank, card applications.