Passport Express Purchase Process

The Passport Express Purchase process, which allows users to share their Wallet information with third-party Web sites, takes place in the following sequence:

1. The user clicks the “Express Purchase” icon on a participating e-commerce site.

2. Redirect to Passport. This icon redirects the user’s browser to a Passport Express Purchase (EP) server. Appended to the HTTP query string in the redirect is a Return URL, so Passport knows where to redirect the user’s browser after the authentication process is finished; a Site ID, which allows Passport to identify the site making the request; and a list of credit card types and countries for which the site accepts payment (which allows Passport to display the appropriate fields on the wallet page in step 6).

3. Cookie check. The Passport EP server checks for its own cookies. If these cookies are present, and show that the user has signed into Passport within the last 100 seconds, the system immediately redirects the user to the wallet profile page (step 5).