PDF Have I Been Pwned (HIBP), the free website used by millions to check whether their credentials have been compromised, has open sourced its code base, founder Troy Hunt announced today. Hunt first mentioned plans to open source the HIBP code base last summer. Now, as requests for the website's Pwned Passwords approach 1 billion per month, he has confirmed it is officially open source via the .NET Foundation, an independent 501(c) nonprofit organization. There are a few reasons Pwned Passwords works well for the open source model, which is why he decided to start there, Hunt explained in a blog post.