Patent ID: 11874914
Assignee: PASSLOGY CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 5:
6. A non-transitory computer readable information recording medium having stored therein a server program that, when executed by a server computer, causes the server computer to:
cause access information to sign-in to the server computer to be transmitted from a token terminal;
apply a first function to at least the transmitted access information and a secret site seed, wherein the secret site seed is assigned to the server computer, thereby obtaining a user seed;
transmit the obtained user seed to the token terminal, thereby enabling the token terminal to register the server computer in the token terminal;
receive, from an access terminal, a request to sign-in to the server computer specifying a key code and access information;
apply the first function to at least the specified access information and the secret site seed, thereby obtaining a checkup seed;
obtain a share seed independently from the token terminal, wherein the share seed is shared with the token terminal;
apply a second function to at least the obtained share seed and the obtained checkup seed, thereby obtaining a checkup code; and
determine whether to permit or reject the request,
wherein the request is rejected when the received key code is inconsistent with the obtained checkup code.