Integration of AES Algorithm with QR Code for Text Message Security

The increasing reliance on digital communication has heightened concerns regarding the confidentiality of transmitted text messages. This study integrates the Advanced Encryption Standard (AES) algorithm with Quick Response (QR) Code technology to enhance data security and usability in text-based communication. The system encrypts plaintext using AES to produce ciphertext, which is then encoded into a QR Code for secure and convenient transmission. The experimental results demonstrate an average encryption time of 18.42 ms and a decryption accuracy of 99.68%, confirming the feasibility of the model for real-time use. Compared to previous AES–QR implementations, the proposed system achieves improved operational efficiency and user satisfaction (SUS = 86.2/100). This study contributes a practical and efficient framework for secure message transmission and recommends future exploration of automated key management and multi-user scalability.