If youre checking Instagram on public Wi-Fi, you may be exposing more than you realize. A security researcher named Mazin Ahmed has published a new report showing how easy it is to hijack an Instagram account, and taking the company to task for lax security. The technique relies on catching Instagram data in transit, either through an open Wi-Fi hotspot or a more sophisticated attack at the network level. If attackers can do that, Ahmed says, theyll be able to see unencrypted pictures, user IDs and account keys — potentially allowing outsiders to take over your account entirely.