Blockchain is an emerging technology and the future of modern world. In Blockchain, digital records and transactions are stored in a block. Each block consists of a hash of previous block, time duration, and transaction of data and each block is then linked to the next block, in a
BlockChat: Blockchain-enabled fast and secure communication system for Industry 4.0
Blockchain is an emerging technology and the future of modern world. In Blockchain, digital records and transactions are stored in a block. Each block consists of a hash of previous block, time duration, and transaction of data and each block is then linked to the next block, in a linear, chronological order, using a cryptographic signature forming a chain called blockchain. Data cannot be interpreted if third party want to interrupt it due to its shape and design. Security and privacy have become the integral requirement of current era. The fact that the software uses Blockchain technology makes it very secure from outside attacks. Blockchain can bring huge change across the globe and modifying the way we do so many things. The proposed system provides the useful blockchain technology based on application for communication with enhanced security system. This application would end up with additional useful communication features of group chat, call, video call, contact share and status notification as well.
Blockchain is an indubitable resourceful development, record-keeping is the essential motivation behind this innovation. Records are interconnected utilizing cryptography as rundown called blocks. In terms of strategy, the block chain does not support data control. It grants computerized data to convey however not replicated. The Blockchain Messenger is visit, Images, Audio Application that permits individuals to call each other uninhibitedly and offer pictures and area. It very well may be sign up without obstruction of email account or number. The Blockchain Messenger application encrypted to the end does not leave any traces of data behind, thus, providing complete privacy. Even the authorities could not browse around the activities of the users.


Methodology selection is as important as first building block for development of application.
After designing of this app, the methodology selected should be flexible in order that it is often molded as user’s interest changes or with any increase in features of application. for instance, introducing new fields and features. So, our project will follow agile process model.
Limitations
From centuries, social networking is the task performed by people most commonly.
This project can help a common man to use mobile application for chatting with enhanced security mechanism.
Common man can use this application tension free of privacy and security issues with the help of digital signatures and hash involved in Blockchain technology.
This secure chat application provides all the features of trending chat application nowadays.
Which includes:
This is an android chat application based on blockchain technology which provides its users with secure chatting and calling experience. The application can be installed from play store and through web page by downloading APK file.
This application comprises of 6 major features. A user who signups can do the following activities:
He can send SMS to his fellow contact on the application. The chatting is secure due to use of blockchain technology.
User can also called his/her contacts which will be done with the use of sockets.
Apart from audio call this application also provides real-time video calling functionality.
Application also provides teaming or group chat functionality where user can create groups and add his friends in the group.
Application also lets user upload status like whatsapp app and contacts can view or reply to the status.
Lastly a chat app is incomplete without media sharing feature. Application lets user send media files in multiple formats. User can share Pictures, videos, document files etc.
| Item Name | Type | No. of Units | Per Unit Cost (in Rs) | Total (in Rs) |
|---|---|---|---|---|
| Internal PC Hard disk WD 2TB | Equipment | 1 | 7500 | 7500 |
| Backup Drive seagate 2TB Expansion portable USB 3.0 External Drive | Equipment | 1 | 22000 | 22000 |
| Logitech Presenter R 800 green Laser | Equipment | 1 | 7000 | 7000 |
| USB hub 4 port 2.0 with button | Equipment | 1 | 2000 | 2000 |
| TP Link Gigabit | Equipment | 1 | 11500 | 11500 |
| Power Bank 40000mAh 18W PD QC 3.0 | Equipment | 1 | 10000 | 10000 |
| PTCL Charji EVO Cloud Device with internet services | Equipment | 1 | 10000 | 10000 |
| printing | Miscellaneous | 5 | 2000 | 10000 |
| Total in (Rs) | 80000 |
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