Recently it became well-known that websites can leak information about a user based on if that user is logged in or not with this example that can demonstrate the issue. I’d recommend reading that page for a quick overview of how it can be done (but note that it is not the only way, as I will discuss below). So how can we properly prevent this information leak?

It’s not every day you get to release a freelance project as open source, but in this case I’m pleased to be able to release flshm as open source on GitHub.

This project was developed for a client who wanted to add some new features to an existing Flash-based project, but was running into some limitations due to the sand-boxing features which are even present when publishing a desktop application.