Hefei Electronic Engineering Institute, Hefei , China

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Presentation transcript:

Visual secret sharing scheme for (k, n) threshold based on QR code with multiple decryptions Hefei Electronic Engineering Institute, Hefei 230037, China Source: Journal of Real-Time Image Processing (2017): 1-16. Authors: Wan Song, Lu Yuliang, Yan Xuehu, Wang Yongjie, Chang Chao Speaker: Huang Peng-Cheng Date: 1/15/2019

Outline Introduction Related works Proposed scheme Simulation results Extensions Conclusions Comments

Introduction(1/1) --visual cryptography scheme(VCS)

Related works(1/2) –Wang et al.’s scheme Wang, G., Liu, F., Yan, W.Q.: 2D barcodes for visual cryptography. Multimed. Tools Appl. 75, 1–19 (2016)

Related works(2/2) Chow, et al.’s scheme Chow, Y.W., Susilo, W., Yang, G., Phillips, J.G., Pranata, I., Barmawi, A.M.: Exploiting the Error Correction Mechanism in QR Codes for Secret Sharing. Springer International Publishing, New York (2016)

Proposed scheme (1/4) -- encoding process(1/1) Encoding procedure {QR1,…,QRn} {SC1,…,SCn}

Proposed scheme (2/4) --decoding process(1/1)

Proposed scheme(3/4) -- The algorithm (1/2) (7, 7)

Proposed scheme(4/4) -- An example for encoding process (2, 2) VSSQR 1 QR1 1 A1 A2 A3 A4 QR2 QR1 QR2 before after

Simulation results (1/5) (2, 2) VSSQR

Simulation results (2/5) (2, 3) VSSQR

Simulation results (3/5) (2, 3) VSSQR

Simulation results (4/5) (3, 3) VSSQR

Simulation results (5/5) Visual quality of the revealed secret images Contrast:

Extensions

Conclusions Meaningful shares => the decodable of QR code. Two ways of secret revealing: Stacking => OR operation => do not need any computational device. XOR operation => lightweight device.

Comments (k, n) or (n, n)? (2, 100)?