vignesh_phpfreak

this may be a very basic question. I would like to know whether the data which are displayed only to logged in (php session authenticated) users will be crawlable by search engines? for example: there is a page www.domain-name.com/content-listings/ and this page lists some information for user. Non-registered users will view basic information like name and postal address and these should be SEO friendly and crawlable. Registered users (logged in) will view sensitive information such as email_id and phone number which should not be crawlable by search engines. will this be just achieved with sessions or do I need to use javascript and ajax to make email id and phone number protected from crawling and spammers.