ST. LOUIS – During the pandemic, we saw a lot more QR codes. They’re the squares with lines and dots. QR stands for quick response. When they’re scanned by a smartphone, the unique pattern translates into human-readable data. While many think it just contains info or a menu at a restaurant, some QR codes can actually lead to security problems.

So what do we look for and how do we avoid it? Scott Schaffer, Blade Technologies‘ lead security officer, explained.