There is a multilingual web shop, visitors can access from two domains, with different language:
hxxp://x.com - English
hxxp://x.ru - Russian, which is an add-on domain to x.com.

The authentication and cart pages are here, through SSL: https://x.com/index.php?mode=login

How can I use the cookie informations of x.ru on hxxps://x.com? And is it ok to redirect the visitors of x.ru to hxxps://x.com for authentication, and after that, redirect back to x.ru?

teşekkür ederim.