Granted Patent B2

US 12,271,874 · App. 18/341,024 · Granted Apr 8, 2025

Inventor: Seungshin Choi (Seoul, KR)

G06Q20/1085G06Q20/3278G06Q20/4014

Abstract

Claims (25)

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

an input terminal; and

an output terminal,

wherein the output terminal is configured to:

provide the one-time keypad to the input terminal; and

generate the one-time keypad based on a synchronization between the input terminal and the output terminal, and

wherein the input terminal is configured to:

output an input window 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 input window;

receive the one-time keypad through near field communication (NFC) with the output terminal in contact with the input terminal; and

determine whether the security key coincides with a preset code, and approve whether to disable security, based on the determination.

2. The security key input system of claim 1 , wherein the output terminal comprises an external interface configured to perform NFC.

3. The security key input system of claim 1 , wherein the input terminal comprises an ATM (Automated Teller Machine), door lock, safe or computer.

4. The security key input system of claim 1 , wherein the one-time keypad comprises a keypad of which a key arrangement is randomly set, and the key arrangement is changed whenever the one-time keypad is generated.

5. The security key input system of claim 4 , wherein a first number of one-time keypads to be generated is equal to a second number of security keys to be inputted, and a different one-time keypad is provided in response to each security key input.

6. The security key input system of claim 5 , wherein the input terminal is further configured to output a result of the determination through at least one of changing a color of the input window or outputting a sound.

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

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

9. A security key input method using a one-time keypad, comprising the steps of:

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

(B) transmitting, by the output terminal, the generated one-time keypad to the input terminal;

(C) outputting, by the output terminal, the generated one-time keypad;

(D) 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

(E) 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.

10. The security key input method of claim 9 , wherein the step (B) of transmitting the generated one-time keypad is performed through NFC by a contact between the output terminal and the input terminal.

Priority Claims (7)

Continuity (2)

References Cited (24)