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AssigneeA.T Communications Co., Ltd.
InventorsKen-ichi Sakina, Youichi Azuma, Kishi Hideaki
Estimating the term…
A two-dimensional code authenticating device reads a self-authentication two-dimensional code to obtain an RS bit string, and detects a bit string c′ as an error using the RS bit string. Next, an exclusive OR between a bit string l included in the RS bit string and the bit string c′ detected as an error is calculated to obtain a bit string c′, and a bit string md is obtained by decrypting the bit string c′ through a scheme corresponding to the encryption. Subsequently, it is determined whether or not the decrypted bit string md matches the bit string m included in the RS bit string, thereby authenticating the self-authentication two-dimensional code.
A two-dimensional code authenticating device for authenticating a two-dimensional code comprising an information area expressing predetermined information by a distribution pattern of cells and a correction area expressing correcting information for correcting an error by a distribution pattern of cells, the two-dimensional code authenticating device comprising:
A two-dimensional code authenticating method for authenticating a two-dimensional code comprising an information area expressing predetermined information by a distribution pattern of cells, and a correction area expressing correcting information for correcting an error by a distribution pattern of cells, the method comprising:
A program that causes a computer of a two-dimensional code authenticating device for authenticating a two-dimensional code comprising an information area expressing predetermined information by a distribution pattern of cells, and a correction area expressing correcting information for correcting an error by a distribution pattern of cells to execute:
Dependencies are inferred from the claim text.