Design And Implementation Of Digital Watermarking Algorithm For QR Code Anti-Counterfeiting Authentication

The rapid development of Internet of Things technology and e-commerce provides a broader platform for the application of bar code technology in China.The two-dimensional code has the advantages of high information density,large storage capacity,strong error correction capability,and independent on back-end database support,which makes up for the shortcomings of existing one-dimensional barcode.But at the same time,the information security can not be effectively protected due to the open of QR code encoding method,which may leave space for some counterfeit QR code.In order to solve the anti-counterfeiting and security problem of two-dimensional code,this paper proposes a two-dimensional code anti-counterfeiting authentication scheme based on digital watermarking technology,and carries out detailed analysis design and performance evaluation of the core-digital watermarking algorithm in the anti-counterfeiting authentication scheme.1.summarizing current two-dimensional code anti-counterfeiting technology,compare and analyse the advantages and disadvantages of various anti-counterfeiting technologies.According the widely use of two-dimensional code in product circulation and good results of digital watermark technology in anti-counterfeiting field,to combine two-dimensional code technology and digital watermarking technology apply in anti-counterfeiting authentication.2.Proposing QR-based code anti-counterfeiting authentication scheme which is based on digital watermarking technology,according to the proposed anti-counterfeiting authentication scheme.By the proposed anti-counterfeiting authentication scheme,a digital watermarking algorithm based on the hadamard transform is designed.In the choice of image watermarking,we choose the HASH value as watermark information which is directly related to image content,and a correction method for image distortion after print-photo is given.3.The performance of the digital watermarking algorithm is evaluated by attack experiments.The experimental results show that the digital watermarking algorithm proposed in this paper can resist the attacks of rotation,cut and noise,and has good robustness.The capacity and imperceptibility of digital watermark information can also meet the requirements of the anti-counterfeiting certification scheme.4.The simulation experiment of the anti-counterfeiting authentication scheme proposed in this paper is carried out.The simulation experiment shows that the anti-counterfeiting authentication scheme designed in this paper can realize the anti-counterfeiting authentication of QR image,and the digital watermarking algorithm has no dependent on the backend database,high security,anti-counterfeiting authentication and good timeliness,etc.,have certain application value.