关键词: QR码, 数字签名, 数字水印, 安全性, 不可抵赖性

Abstract: With the extensive application of the twodimensional code, online twodimensional code generation technology has been quite mature. If you know the stored information in the twodimensional code, it is very simple to forge twodimensional code. Digital watermarking technology can solve this problem, because digital signature technology has features such as integrity, non repudiation, which can greatly improve the anticounterfeiting characteristics. This paper designs a QR code watermark authentication system based on digital signature. First of all, we should use digital signature to address the QR code, and then signature information and the QR code watermarking information is embedded into QR code carrier image, so as to ensure the safety of a QR code tag.

Key words: QR code, digital signature, digital watermark, safety, non repudiation