Microsoft has launched a website that cranks out security scores for the various editions of its own Internet Explorer (IE) as well as browsers built by rivals Google and Mozilla.
The new site -- yourbrowsermatters.org -- runs a browser through a security feature checklist, then posts a score out of a possible high of four points.
Not surprisingly, Internet Explorer 9 (IE9) comes out on top with a perfect score of 4 out of 4. The older IE8, which debuted in 2009, garnered a 3.
Google's Chrome 14 -- the current "stable" build that launched last month -- kicked back a second-place score of 2.5 out of 4.
Another month-old browser, Mozilla's Firefox 7, generated a ranking of just 2.
And Opera Software's Opera and Apple's Safari -- the two remaining browsers of the top five -- weren't even competitive enough in Microsoft's eyes to warrant a score. Both simply displayed the message "We can't give you a score for your browser."
The new site and its scoring exam are meant to illustrate the insecurity of older browsers, said Microsoft -- its decade-old IE6, an application Microsoft has not been shy about wanting to kill, scored 0 out of a possible 4 -- as well as the prevalence of Web-based threats that try to trick users into making poor decisions.
"Browsers that provide better protection against the most common threats -- such as socially engineered malware -- will receive a higher score," said Roger Capriotti, Microsoft's chief IE marketing executive, in a Tuesday blog.
Microsoft has touted the malware-blocking abilities of IE8 and the newer IE9 for some time, regularly citing studies done by NSS Labs -- some paid for by Microsoft, some not -- that recently announced IE9 stymied 99.2% of all malicious links and Web-hosted malware it faced.
Capriotti also referenced Microsoft's latest Security Intelligence Report, which downplayed the threat posed by "zero-day" vulnerabilities in lieu of their small part in the overall threat theater.
"The biggest threats stem from clever 'socially engineered' malware targeting outdated software, such as older Web browsers," said Capriotti.
Microsoft's two-year-old IE8 scored better on the company's security test than newer browsers from either Google or Mozilla.
According to Microsoft, the company worked up the scoring methodology -- which it published in full on its site ( download PDF ) -- in conjunction with unnamed security researchers and several organizations, including the Anti-Phishing Working Group (APWG), Identity Theft Council and Online Trust Alliance.
Microsoft is a premium member of APWG and on the steering committee of Online Trust Alliance.
Both Capriotti in his blog and Microsoft in the description of the site's scoring methodology anticipated disagreement about the test. "Security scores like this are often the subject of much scrutiny, and there is certainly no single test that can perfectly summarize all aspects of browser security," said Capriotti.
The company went further in its methodology document. "If you still consider the security score to be arbitrary, we encourage you to design one better," said Microsoft.
Google and Mozilla did not immediately reply to requests for comment on Microsoft's test and their browsers' scores.