Method, system and electronic device

1. A method comprising:

generating a one-time password according to a one-time password algorithm using at least a secret key stored in a first electronic device and an integer value that represents a number of time steps, which each have a predetermined duration, from a predefined initial time to a current system time of the first electronic device;

generating a representation of the one-time password by coding the one-time password according to a coding scheme to generate a pictorial animation;

displaying the pictorial animation on a display of the first electronic device;

capturing the pictorial animation with a camera of a second electronic device;

restoring the one-time password from the pictorial animation; and

authenticating a user at the second electronic device, or at a web site or web service which is accessible via the second electronic device, using the restored one-time password.

2. The method of claim 1 , in which the one-time password is generated according to a hash-based message authentication code (HMAC)-based one-time password algorithm using the secret key and a counter value generated based on the current system time.

3. The method of claim 1 , in which the restored one-time password is used as a second factor authentication password.

4. A system, comprising

a first electronic device including:

a processor configured to

generate a one-time password according to a one-time password algorithm using at least a secret key stored in the first electronic device and an integer value that represents a number of time steps, which each have a predetermined duration, from a predefined initial time to a current system time of the first electronic device,

generate a representation of the one-time password by coding the one-time password according to a coding scheme to generate a pictorial animation, and

a display configured-to display the pictorial animation; and

a second electronic device including:

a camera configured to capture the pictorial animation representation of the one-time password generated by the first electronic device, and

a processor configured to:

restore the one-time password from the pictorial animation, and

authenticate a user at the electronic device, or at a web site or web service which is accessible via the electronic device, using the restored one-time password.

5. The system of claim 4 , wherein the first electronic device further includes:

a user interface which enables a user of the electronic device to trigger the generating of the one-time password.

6. The system claim 4 , wherein the first electronic device is a wearable electronic device.

7. The system claim 4 , wherein the first electronic device is a smart watch.

8. The system according to claim 4 , wherein the processor of the first electronic device is configured to:

acquire the current system time of the first electronic device; and

generate a counter value based on the current system time of the first electronic device.

9. The system according to claim 8 , wherein the processor of the first electronic device is configured to generate the one-time password according to a hash-based message authentication code (HMAC)-based one-time password algorithm using at least the secret key and the counter value generated based on the current system time of the first electronic device.

10. The system of claim 4 , wherein

the pictorial animation is a dancing character, and

the processor of the first electronic device is configured to code the one-time password by transferring digits of the auxiliary key to movements of the dancing character.

11. The system of claim 10 , wherein

the coding scheme is defined by defining each dance move of the dancing character as a numeric code.

12. An electronic device comprising:

a camera configured to capture a pictorial animation representation of a one-time password generated by another electronic device that codes the one-time password according to a coding scheme to generate the pictorial animation, the one-time password having been generated at the another electronic device according to a one-time password algorithm using a secret key and an integer value that represents a number of time steps, which each have a predetermined duration, from a predefined initial time to a current system time of the another electronic device; and

a processor configured to

restore the one-time password from the pictorial animation, and

authenticate a user at the electronic device, or at a web site or web service which is accessible via the electronic device, using the restored one-time password.

13. The electronic device of claim 12 , in which the restored one-time password is used as a second factor authentication password.

14. The electronic device of claim 12 , in which the restored one-time password is used to authenticate a user at a web site or web service.

15. The electronic device of claim 12 , the electronic device being an optical head-mounted display.