Last week we saw perhaps the single largest data breach dump in history, close on the heels of another massive data disclosure from the same group. Dubbed “Collections 1-5”, together these data dumps represent literally billions of unique user email addresses and passwords. Using the online tool Have I Been Pwned will tell you whether your email address or password is contained in this hacker’s treasure trove. I will also tell you how you can mitigate the damage from this and future breaches.

In other news, Apple’s FaceTime app contains a huge bug that could let other people eavesdrop on you and potentially even view you through your camera; Google and Firefox are offering competing visions of browser privacy with controversial new features; and a recent Mac malvertising campaign is using a classic technique called steganography to disguise its malicious intentions.