Decentralized Authentication And Authorization System Based On Qr-Code Data Extraction And Blockchain Technology

Abstract

The article presents a decentralized authentication system based on extracting steganographic data from a biometric QR code (BIO QR code), which serves as a container for storing biometric and documentary data. The QR codes are embedded in the least significant bits (LSB) of the RGB channels of a facial image. The proposed method consists of extracting data from the biometric QR code and blockchain verification. Experiments on a sample of 100 images confirmed 100% accuracy in data extraction from BIO QR codes. The system eliminates reliance on centralized servers and ensures protection against data tampering through blockchain immutability.