Dual Anti-counterfeiting of QR Code Based on Information Encryption and Digital Watermarking

Abstract

The QR code is widely used in modern internet life as its fast speed of response, large capacity of information and the wide range of coding. Therefore, it’s an important means to improve the anti-counterfeiting performance of QR code and prevent QR code from being copied and tampered in order to improve the security of information. Based on the coding principle and identification method of two-dimensional codes, this paper proposes a dual anti-counterfeiting method with information encryption and digital watermarking for QR code. Firstly, an encryption algorithm based on RSA is used to encrypt authorization information. Then, a corresponding watermark image is generated based on the encrypted information. Finally, an anti-print embedding and extraction image watermarking method combined with discrete wavelet transform (DWT) and singular value decomposition (SVD) is introduced. The extracted watermark and decrypted information are compared and verified to achieve the dual security of QR code. The result of the attack experiment shows that the digital watermark has strong robustness and invisibility. The anti-counterfeit test results verified the feasibility of the proposed method.