How to Create session for customer login with session outside magento

Question

I am building a small web services code to where I need to have magento customer login. But not able to create the session. If I create the session from core/session it remains same for the browser for all the users.

Question 1: Where are the sessions stored in the database?

Question 2: How to create customer/session and then to fetch that on different location with same session ID??

used this method but this is for core I need to know the customer is logged in or not with session id.:

$session = Mage::getSingleton("core/session",  array("name"=>"mobiledevice"));

This gives the browser session id not the customer

$session->getEncryptedSessionId()

Answer 1

Sessions are stored in database session table or something like that or, more commonly, in var/session. Depends on the install.

Login user programmatically in magento not working properly?

tells you how to log someone into magento "outside" of the magento. I do think the answer in the link is missing:

Mage::app('mysite');

before running the code. So something like this:

Mage::app('mysite');
$session = Mage::getSingleton( 'customer/session' );
try
    {
        $session->login( $email, $password );
        $session->setCustomerAsLoggedIn( $session->getCustomer() );
        return true;
    }
    catch( Exception $e )
    {
        //error handling code
    }

to create a user look here: http://inchoo.net/ecommerce/magento/programming-magento/programatically-create-customer-and-order-in-magento-with-full-blown-one-page-checkout-process-under-the-hood/