| The Diffie-Hellman Key Exchange Protocol and non-abelian nilpotent groups Recent countries visiting this post |  |
 | 5 | United States |
 | 2 | |
 | 1 | Russian Federation |
| The Diffie-Hellman Key Exchange Protocol and non-abelian nilpotent groups Recent countries visiting this post | |
| 5 | United States |
| 2 | |
| 1 | Russian Federation |