CERTbchain: A Step by Step Approach Towards Building A Blockchain based Distributed Appliaction for Certificate Verification System

A certificate is a document that is received once the person completed a particular course. This certificate can be used to get a job or to get admitted to an institute/university of higher studies. Most of the institutes/universities do not have a mechanism in the admission system that can catch forged certificates. Hence, a system that can store certificates on the blockchain and stop the admission forgery through fake certificates is required. The proposed framework is based on blockchain technology that improves security, transparency, etc., and reduces the cost. To overcome the problem of fake certification, a chain of blocks is created for certificates that are immutable as well as transparent amongst all the nodes in the system. This paper presents a step-by-step development process for a certificate verification system using blockchain technology. The key component of this system is a smart contract. A Smart contract Certi has been developed for storing certificates by using a text editor Sublime Text3 and an IDE Remix Ethereum. The validity of the stored certificates can be checked by the employer or admission team at the time of recruitment or admission using Certi smart contract. Blockchain technology possesses its transparency feature hence at the same time the same data on the certificate can be seen by the employer, admission team as well as student itself.