Technologies are rapidly increasing and dependent on the Internet. In near future, Hardware will be embedded with software and interconnected to the Internet to send or receive data, which is termed as Internet of Things. Resulting to Database shared between different devices, technology of Distributed Database is Blockchain. Using these latest technologies, Internet of things (IOT), block chain, and Near Field Communication (NFC) for providing data protection, we are developing a system for authentication on Android applications. In this paper, we are using Zero knowledge authentication system to login into Android application using Hashing Technique along with NFC. The data generated in Android Application and transferred to block chain server which convert the transaction details into blocks, which ever growing and store it in blockchain storage. With the help of all these technologies we are providing more Secure environment which prevent data tampering and modification. As well restricted data or block visibility. With unbreakable authentication system.

IOT, Blockchain, NFC, Android Application

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