Secret Sharing Application for Two-dimensional QR Barcode

A secret sharing system based upon two-dimensional QR barcode is proposed in this article. The proposed approach generates shadows in a specific way and utilizes the characteristics of QR code to embed shadows into cover QR codes. Each cover QR code itself is a valid QR code which can be scanned and decoded by a general QR code reader. According to the experiments, the proposed approach can satisfy the content readability of the QR code and can be distributed via public channels without raising suspicion.