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Authentication server, authentication system, authentication method, and program

  • US 9,654,291 B2
  • Filed: 07/03/2013
  • Issued: 05/16/2017
  • Est. Priority Date: 07/03/2013
  • Status: Active Grant
First Claim
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1. An authentication server connected via a network to a communication client that generates a bit signal by capturing an image of a two-dimensional code, the two-dimensional code being provided with an information area that expresses designated information with a cell distribution pattern, and a correction area that expresses correction information for correcting errors with a cell distribution pattern, wherein one part of the correction area is substituted with the exclusive OR of a first correction bit sequence generated from the one part, and a second correction bit sequence generated from a part different from the one part of the correction area, the authentication server comprising:

  • bit signal receiving means that receives the bit signal transmitted from the communication client via the network;

    decoding means that decodes the bit signal received by the bit signal receiving means to acquire the designated information and the correction information;

    error detecting means that uses the correction information acquired by the decoding means to detect the exclusive OR of the first correction bit sequence and the second correction bit sequence as error;

    two-dimensional code authenticating means that authenticates the two-dimensional code by determining whether or not the exclusive OR of the first correction bit sequence included in the correction information and the error detected by the error detecting means matches the second correction bit sequence included in the correction information; and

    information transmitting means that, when the two-dimensional code authenticating means obtains an authentication result of both matching, transmits the designated information acquired by the decoding means to the communication client via the network.

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