US 11,956,404 B2
Authentication device and image forming apparatus
Yoshio Morita, Osaka (JP)
Assigned to KYOCERA Document Solutions Inc., Osaka (JP)
Appl. No. 16/972,571
Filed by KYOCERA Document Solutions Inc., Osaka (JP)
PCT Filed May 23, 2019, PCT No. PCT/JP2019/020412
§ 371(c)(1), (2) Date Dec. 4, 2020,
PCT Pub. No. WO2019/239834, PCT Pub. Date Dec. 19, 2019.
Claims priority of application No. 2018-113775 (JP), filed on Jun. 14, 2018.
Prior Publication US 2021/0250467 A1, Aug. 12, 2021
Int. Cl. H04N 1/44 (2006.01); G06F 21/31 (2013.01); G06F 21/45 (2013.01)
CPC H04N 1/4413 (2013.01) [G06F 21/31 (2013.01); G06F 21/45 (2013.01); H04N 1/4433 (2013.01)] 3 Claims
OG exemplary drawing
 
1. An authentication device comprising:
a storage device that previously stores user information for identifying a user and a plurality of fixed passwords in association between the user information and the plurality of fixed passwords;
an input device for use in entering user information and a password; and
a controller that executes login when user information and a password are entered through the input device and the entered password is identical to one of the plurality of fixed passwords previously stored in association with the entered user information in the storage device,
wherein when the entered password is identical to none of the plurality of fixed passwords previously stored in association with the entered user information in the storage device and any one of the plurality of fixed passwords satisfies a predetermined condition on similarity to the entered password, the controller inhibits an authentication based on the fixed password satisfying the predetermined condition from being made for a predetermined period,
wherein the controller sets, as the predetermined conditions, a first condition indicating that similarity to the entered password is equal to or greater than a predetermined first value, and a second condition indicating that the similarity to the entered password is equal to or greater than a second value lower than the first value,
the controller allows the storage device to store information indicating a fixed password having most recently satisfied the predetermined condition,
when any one of the plurality of fixed passwords satisfies the first condition, the controller inhibits an authentication based on the fixed password satisfying the first condition from being made for the predetermined period, and
when any one of the plurality of fixed passwords continuously satisfies the second condition, the controller inhibits an authentication based on the fixed password continuously satisfying the second condition from being made for the predetermined period.