Authentication device, and non-transitory computer-readable device storing authentication program

A non-transitory computer-readable device storing an authentication program which causes a computer, including a storage unit configured to store authentication information in which a preset identifier including a plurality of identifiers, a pattern of a relative input position of the plurality of identifiers within a displayed layout of input frames, and a pattern of an absolute input position of the identifiers within a displayed layout of input frames are associated, to perform operations, the operations comprising:

• acquiring input information, the input information including identifiers input from a user and an input position of the identifiers within the displayed layout of the input frames;
• granting authentication according to a first security level when the identifiers included in the input information correspond with the identifiers in the authentication information, and when a pattern of a relative input position of the identifiers within the displayed layout of the input frames included in the input information corresponds with the pattern of the relative input position of the identifiers in the authentication information;
• granting authentication according to a second security level, wherein the second security level is different from the first security level, when the identifiers included in the input information correspond with the identifiers in the authentication information, and when a pattern of an absolute input position of the identifiers included in the input information corresponds with the pattern of the absolute input position of the identifiers in the authentication information.