Efficient QR code authentication mechanism based on Sudoku

Peng Cheng Huang, Yung Hui Li, Chin Chen Chang, Yanjun Liu

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


QR code is an important means for delivering information which has been widely used in our daily life. As an ISO international standard, the QR code encoding and decoding process are disclosed publicly, thus it is easy to decode a QR code then forge a new QR code with the same QR code public message. It can lead to the problems of information forgery and ease the spreading of fake news. To overcome this weakness, we propose a simple and efficient QR code authentication mechanism to embed the authentication information in the padding region of QR code based on the characteristics of Sudoku and Reed-Solomon code. Different from the previous scheme, the proposed scheme embeds the authentication information without consuming the QR code error correction capacity and is able to achieve a higher embedding capacity. Experimental results show that the proposed scheme has high security, low power consumption and is robust to common QR code attacks.

Original languageEnglish
Pages (from-to)26023-26045
Number of pages23
JournalMultimedia Tools and Applications
Issue number18
StatePublished - 30 Sep 2019


  • Authentication
  • QR code
  • Reed-Solomon code
  • Sudoku


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