| A Human-Verifiable Authentication Protocol Using Visible Laser Light Recent countries visiting this post |  |
 | 10 | United States |
 | 1 | Japan |
 | 1 | Russian Federation |
 | 1 |
| A Human-Verifiable Authentication Protocol Using Visible Laser Light Recent countries visiting this post | |
| 10 | United States |
| 1 | Japan |
| 1 | Russian Federation |
| 1 |