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EV Upgrader: Enabling Windows XP Clients for Extended Validation
from  VeriSign

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White Paper

Description:
In order to prove to site visitors that a site has passed Extended Validation authentication, VeriSign created the EV Upgrader—the first-ever solution to enable all visiting Windows Internet Explorer 7 browsers to detect EV SSL Certificates and display them appropriately. This white paper details the behavior of EV Upgrader and how it triggers root installation in Windows XP operating systems.

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EV Upgrader is a server-side application that prompts visiting IE7 systems to update their VeriSign SSL Certificate roots. Microsoft specifically engineered Internet Explorer to allow root updates of this nature, and therefore the update is virtually instantaneous and undetectable to the site visitor. The only change the user sees is the display of green address bars and other EV interface conventions when visiting sites that have VeriSign EV certificates.

To make using EV Upgrader as easy as possible for site administrators, VeriSign has built it right into the VeriSign Secured Seal. That means all you have to do to maximize consumer confidence in your EV-authenticated site is install the VeriSign Secured Seal. Installation takes minutes, and no additional administration is required. The VeriSign Secured Seal even gains this functionality automatically on existing sites, so if your site already has the VeriSign Secured Seal, you don't need to do a thing.

VeriSign signs EV certificates with a non-EV intermediate root to ensure full coverage for your site on legacy browsers. In order to enable EV functionality and behavior, VeriSign signs EV certificates with a new EV root as well. This innovative design makes possible a single SSL Certificate that offers the same comprehensive browser ubiquity as traditional VeriSign SSL Certificates and still enables EV functionality on the broadest possible set of IE7 client systems.

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