What is 1-legged, 2-legged, 3-legged?

Question

IT terminology

Good afternoon.
Colleagues, tell me what is 1-legged, 2-legged, 3-legged?

Answer 1

It is a question of "steps" at procedures of authentication/authorization.
If you are not against English, here you can read about it in detail, so as not to duplicate:
1-legged
2-legged
3-legged I
recommend reading the whole page, there for different versions