Abstract
The rapid development of digital technologies requires the creation of secure and efficient methods for storing and managing confidential personal data. Modern personal documents such as birth certificates, identity cards, and passports are often vulnerable to fraud, forgery, and unauthorized access. This article proposes an innovative system that integrates color QR codes and blockchain technology for the secure storage and management of biometric and documentary information. The proposed approach combines steganography, cryptography, and modern data embedding techniques to enhance document security. The combination of encrypted QR codes with a decentralized blockchain-based database ensures confidentiality, reliable authentication, data transparency and traceability. This solution is especially relevant for storing official documents, such as birth certificates, with the inclusion of biometric data of citizens and their family members for improved identification, as well as enabling effective data extraction and prevention of misuse.