Pass-Along Rate
A pass-along rate represents the percentage of people who pass on a message or file. Indeed, pass-along rates are a measure of word-of-mouth marketing. Objects typically passed include email messages, Web pages and multimedia files. Content typically passed includes humor and entertainment, late-breaking news, shopping specials, and technical gizmos.
Passive Authentication
In a passive authentication scenario a user is directed to a login page, and after logging in, the site directs the user back to the URL and allow the user to be authenticated on that site. The passive authentication can be achieved by using WS-Federation protocol or SAML 2.0.