Abstract
Considering incompatibility between the color QR code and the standard QR code decoder and insecurity of information storage in the open network environment, this paper proposes a distributed color QR code by analyzing the decoding process of the QR code, which employs the Shamir’s (k, n) secret sharing algorithm to ensure the security of the secret information and sets threshold to achieve compatibility with the standard decoder. Furthermore, we analyze the influence of threshold values on the performance of the proposed scheme, and determine the valid threshold value interval of the algorithm. Experimental results show that the proposed scheme is feasible with a fast reading speed and high secret storage capacity within the threshold interval.
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