Chrome Users More Likely To Ignore Security Warnings

Security messages affect user behavior -- as long as theyre well-designed, according to study of Chrome and Firefox users.

9 Android Apps To Improve Security, Privacy (click image for larger view)
Chrome browser users: Are you feeling invulnerable?
That question seems pertinent after a new study that compared peoples reactions to 25 million security warning messages found a curious difference between users of two different types of browsers. Specifically, users continued through 25% of Google Chromes malware and phishing warnings, but only 10% of equivalent warnings from Mozilla Firefox. Similarly, users clicked through
Chromes SSL warning
a whopping 70% of the time, versus only 33% for Firefox.
Those findings were detailed in
Alice in Warningland: A Large-Scale Field Study of Browser Security Warning Effectiveness,
, a research paper written by Devdatta Akhawe, a computer science graduate student at the University of California, Berkeley, who recently collaborated on a study to assess the
value of bug bounty programs
; and Adrienne Porter Felt, who earned her Ph.D. from Berkeley last year and is now a Google research scientist at Google, focusing on Chrome security and privacy problems. Their research is due to be presented at next months USENIX Security Symposium in Washington.
[ Amazon 1Button extension for Chrome reports user activity back to Amazon. Read more at
Jay-Z App, Amazon Extension Slammed On Privacy
. ]
The researchers said they gathered their data via Mozilla Firefox and Google Chromes
in-browser telemetry
-- which users can enable to share anonymous performance data with the respective browser manufacturers -- which allowed them to observe over 25 million warning impressions in situ. The researchers emphasized, however, that at no time did they have access to personally identifiable information.
The discovery that users react to Chrome and Firefoxs warning messages in different ways is good and bad news. The upside is that security warnings can be effective in practice, the researchers note, and that the user experience of a warning can have a significant impact on user behavior. That seems to refute the notion that many users simply dismiss warnings and cant be relied on to parse security-related details and come to a safe browsing decision. Or as noted by the authors of
Securing Java
, in a quotation cited by the Warningland reports authors: Given a choice between dancing pigs and security, the user will pick dancing pigs every time.
But not all warning messages are created equal, as demonstrated by the fact that 70% of Googles SSL warnings were ignored by users, versus only 33% for Firefox users. Either that, or Google Chrome junkies are a bunch of self-selecting danger monkeys.
In fact, the researchers traced some high click-through rates to more advanced users -- namely, users of pre-release or Linux versions of Chrome. Technically advanced users might feel more confident in the security of their computers, be more curious about blocked websites, or feel patronized by warnings, said the researchers, who recommended further studies of this group of users to help design warnings better tailored to their expectations.
Based on the study results, the researchers said, The user experience of warnings can have an enormous impact on user behavior, justifying efforts to build usable warnings. They also noted that Google has also begun testing ways to make more Chrome users heed its SSL warnings. Such a high click-through rate is undesirable: either users are not heeding valid warnings, or the browser is annoying users with invalid warnings and possibly causing warning fatigue.
Another interesting finding was that increasing the number of clicks required to bypass warning messages didnt appear to have any effect. In fact, despite having to click an advanced link followed by a proceed button, Chrome users still bypassed more warning messages than Firefox users, who had to click only a single, simpler warning. We find this result surprising, said the researchers. Common wisdom in e-commerce holds that extra clicks decrease click-through rates -- hence, one-click shopping. Google Chromes warning designers introduced the extra step in the malware/phishing warning because they expected it to serve as a strong deterrent.
One likely explanation for Chromes security warning not being as effective is that after a user decides to bypass the warning, up to a certain difficulty level, they simply wont be stopped. Furthermore, few users clicked on Chromes more information link, suggesting that user attention is a finite resource, the researchers said. Accordingly, unless user experience designers get their browser safety messages right, dont expect most users to pay attention.

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Chrome Users More Likely To Ignore Security Warnings