Granted Patent B2

US 12,511,629 · App. 18/738,381 · Granted Dec 30, 2025

Inventor: Seungshin Choi (Seoul, KR)

G06Q20/1085G06Q20/3278G06Q20/4014

Abstract

Claims (29)

1 . A security key input system using a one-time keypad, comprising:

an input terminal; and

an output terminal,

wherein the input terminal is configured to:

output a security keypad including one or more null keys, each of the one or more null keys having no identification mark written thereon;

receive a security key inputted by a user through the security keypad;

generate, based on a synchronization between the input terminal and the output terminal, the one-time keypad in a form of at least one of a short messaging service (SMS) message or a multimedia messaging service (MMS) message; and

transmit the one-time keypad to the output terminal, and

wherein the output terminal is configured to:

receive the one-time keypad from the input terminal; and

output the received one-time keypad using a display.

2 . The security key input system of claim 1 , wherein the input terminal comprises at least one of an automated teller machine (ATM), a door lock, a safe, or a computer.

3 . The security key input system of claim 2 , wherein the one-time keypad comprises a keypad of which a key arrangement is randomly set, and

wherein the key arrangement is changed whenever the one-time keypad is generated.

4 . The security key input system of claim 2 , wherein a number of one-time keypads to be generated is equal to a number of security keys to be inputted, and

wherein a one-time keypad is provided in response to each security key input.

5 . The security key input system of claim 2 , wherein the input terminal is further configured to:

determine whether the security key inputted from the user coincides with a preset code, through the one-time keypad, and

output the determination result through at least one of a color change of the security keypad or a sound output.

6 . The security key input system of claim 2 , wherein an input window comprises a larger number of null keys than a difference between a number of entire input regions of the input window and a number of digits included in a preset security key.

7 . The security key input system of claim 6 , wherein the entire input regions of the input window are set to null keys.

8 . A security key input method using a one-time keypad, comprising:

(A) generating, by an input terminal, the one-time keypad, based on a synchronization between the input terminal and an output terminal;

(B) converting, by the input terminal, the generated one-time keypad into at least one of a short messaging service (SMS) message or a multimedia messaging service (MMS) message;

(C) transmitting, by the input terminal, the one-time keypad converted into the at least one of the SMS message or the MMS message to the output terminal;

(D) outputting, by the output terminal, the received one-time keypad;

(E) outputting, by the input terminal, a security keypad including one or more null keys each having no identification mark written thereon, and receiving a security key from a user; and

(F) determining, by the input terminal, whether the security key inputted from the user coincides with a preset code, through the one-time keypad, and determining whether the security key is correct or wrong.

9 . The security key input method of claim 8 , wherein the outputting of the received one-time keypad is continued for a preset time, and then ended.

Priority Claims (7)

Continuity (3)

References Cited (28)