What do I not understand about RSA?

Question

RSA

Hello, I’ll say right away that the questions are pretty rubbish, but I can’t find an answer to them, so I will be grateful for the help.

1. Each client has 2 keys - public and private?
2. Is the private key created on the basis of the public key of yours or the interlocutor?
3. What is the problem for an attacker to forge a private key using a known algorithm based on a public key?

Answer 1

1. Each client has 2 keys - public and private?

Yes

2. Is the private key created on the basis of the public key of yours or the interlocutor?

no, they come in pairs

3. What is the problem for an attacker to forge a private key using a known algorithm based on a public key?

it is impossible (more precisely, computationally difficult) to get a private one from a public one and vice versa. Knowing one of the keys and the decomposition of the module into prime factors, you can calculate the other key

Answer 2

https://ru.wikipedia.org/wiki/%D0%9A%D1%80%D0%B8%D...