Web Developers and Footguns

If you offer web developers footguns, you’d better staff up your local trauma department. In a prior life, I wrote a lot about Same-Origin-Policy, including the basic DENY-READ principle that means that script running in the context of origin A.com cannot read content from B.com. When we built the (ill-fated) XDomainRequest object in IE8, weContinue reading “Web Developers and Footguns”

Extended Validation Certificates – The Introduction

In 2005, one of my first projects on the Internet Explorer team was improving the user-experience for HTTPS sites (“SSLUX”). Our first task was to change the certificate error experience from the confusing and misleading modal dialog box: … to something that more clearly conveyed the risk and which more clearly discouraged users from acceptingContinue reading “Extended Validation Certificates – The Introduction”

Authenticode and SHA1–Redux

I tried to install Telerik DevCraft Ultimate, but Windows 8.1 and Windows 10 blocked it: “Unknown Publisher”? Hrm. That’s weird. I know Telerik signs their code and I was pretty sure their code-signing certificate is SHA256, so the new restrictions on SHA1 in code-signing shouldn’t be a problem, right? Sure enough, the code is signed with a SHA256Continue reading “Authenticode and SHA1–Redux”