Researchers at Stanford University are warning that claims about "secure browsing" may be overstated, reports V3.co.uk.
According to the report, the top four browsers -- Internet Explorer, Firefox, Safari and Chrome -- have weak security in their secure browsing options, and do not prevent user history being exposed. In addition, the browsers are not consistent in the way they deliver private browsing.
The researchers offer a number of suggestions for improving security, for instance, that websites should display a seal to show that they respect the mode. Another suggestion is that the browser check websites against a blacklist to look for potential lapses in security.