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Authentication device, authentication method, and recording medium

  • US 9,213,813 B2
  • Filed: 08/23/2013
  • Issued: 12/15/2015
  • Est. Priority Date: 09/03/2012
  • Status: Active Grant
First Claim
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1. An authentication device comprising:

  • a storage device configured to store a registered password associated with an authentication; and

    a hardware processor configured to execute instructions that, in response to execution by the hardware processor, cause the authentication device to perform operations, the operations comprising;

    receiving input;

    creating, based on a history of errors received in the input, an input error list supporting each of characters, digits, or other elements included in the registered password;

    causing the input error list to be stored in the storage device;

    receiving, as input, an input error and a given correction operation that corrects the input error;

    causing the input error to be included in the input error list in response to the input error being corrected by the given correction operation;

    determining that an input password received as input mismatches the registered password stored in the storage device;

    determining, based on the input error list, that a cause of the input password mismatching the registered password is due to the input error that is included in the input error list;

    in response to the input error being included in the input error list, not counting the mismatching of the input password with the registered password in a number of times received input is determined as mismatching the registered password;

    counting the number of times it is determined that input mismatches the registered password; and

    performing authentication with respect to the registered password in response to receiving, as input, a matching password that matches the registered password and in response to the number of times being less than a specified number of input mismatches with respect to the registered password.

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