Mobile applications such as Snapchat and Whisper, popular among college students, have raised widespread concerns about user privacy since their creation, USA Today reports. The recent exposure of surveillance tactics by the National Security Agency raises even more questions about what privacy really means — and that college students should potentially be more careful about what they’re sharing on these “confidential” apps. A Google search for “Snapchat” leads to the app’s website and app stores, as well as a few news stories. However, click over to the “Images” tab and it’s a different story. Screenshots of supposedly private “snaps” have been uploaded to Facebook pages with titles like “Snapchat Adults Only,” “Snapchat Unseen” and “Snapchat Leaked,” which has an accompanying website.