Original URL: http://www.theregister.co.uk/2005/10/25/ie7_crypto_boost/

MS adopts stronger encryption for IE7

Code maker

By John Leyden

Posted in Security, 25th October 2005 10:55 GMT

Microsoft plans to adopt a stronger cryptography protocol in the next version of its web browser software, Internet Explorer 7. IE7 will replace the SSLv2 (Secure Socket Layer) protocol with the sturdier TLSv1 (Transport Layer Security) protocol in default HTTPS protocol settings as a means to provide improved security for ecommerce transactions, according to a posting in Redmond's official IE development blog.

Users of IE6 can manually configure these stronger settings but the changes will mean that more users will be directed towards using the stronger SSLv3 or TLSv1 protocols rather than SSLv2. The change should be seamless for end users but adoption of the stronger encryption protocol by a wider percentage of surfers could create some work for sys admins.

Microsoft reckons that only a "handful of sites" left on the internet require SSLv2. "Adding support for SSLv3 or TLSv1 to a website is generally a simple configuration change," said Eric Lawrence, an IE program manager.

As part of Microsoft's "secure by default" design philosophy, IE7 will block encrypted web sessions to sites with problematic (untrusted, revoked or expired) digital certificates. Users will receive a warning when they visit potentially insecure sites, which users can choose to ignore, except where certificates are revoked. "If the user clicks through a certificate error page, the address bar will flood-fill with red to serve as a persistent notification of the problem," Lawrence explained.

The Beta 2 version of IE7 also changes the way non secure content is rendered in a secure web page. IE7 renders only the secure content by default but it offers surfers the chance to unblock the nonsecure content on a secure page using the Information Bar.

In the same posting, Microsoft also revealed that the new Windows Vista platform will offer several crypto improvements beyond what's offered by IE7. These include support for AES (Advanced Encryption Standard), a strong algorithm recently adopted as a US government standard for electronic security, which offers support for up to 256 bits encryption. Windows Vista will also enables certificate revocation checking by default. ®