Proposal of Blockchain-Based Identity Information Hiding Image Sharing Mechanism for Building Image Sharing System

As SNS (Social Network Service) becomes popular, users are sharing their data on the platform.A large amount of data has been uploaded to the Internet at high speed by general users, and shared data is generally an image or video and includes personal identification information.In general, uploaded data includes facial information, and images containing facial information can be abused by third parties.Therefore, measures are required to prevent anyone other than the person who uploaded the data ledger from using the image without permission.In this paper, we propose a mechanism to share images through a block network by inserting user identity information into uploaded images to securely share images.To prevent indiscriminate use of images, user identification information is inserted into the LSB (Least Significant Bit) of the image based on the randomly generated key by the user, allowing for better management of the image information.In addition, to strengthen the integrity of image data, the hash of image data with hidden identity information is recorded and managed in the block network, thereby preventing excessive data from being inserted into the block network and authenticating the image ledger.Based on the random key, about 99.89% similarity was confirmed when 100 bytes of identity information was inserted into a 255*255 size image.To verify the insertion of image data into the blockchain network, block creation was executed on the private blockchain server.