Smart Verification System for Media File Using Blockchain

In this modern world where information is stored and shared in digital manner in the format of image, video, document privacy and authenticity of the data needs to be preserved which is not an easy task. It has become a major threat where data shared or stored can be tampered or manipulated with and it is very difficult to check for the same. The main principle behind this study is to provide a way to store data in secure manner with the ability to check its authenticity when the need arises. The proposed method integrates blockchain technology to the system which helps to add the media file to the system and store the 256-bit unique hash value generated through keccak-256 hashing algorithm into blockchain using Proof-of-Work protocol. The generated 256-bit hash is stored in blockchain is of immutable nature and it takes approximately 3.5*10^63 seconds to crack the 256-bit encryption. In cases where the need arises to check if the media file is tampered or manipulated it can be done by comparing hash of the media file against hash value that is stored in blockchain. If both hash values are exactly same then the media file is authentic and its integrity is preserved.