📍 Where you are in the curriculum: Week 10 of 12

Welcome to Unit 4: Living Online! You've built serious security skills over the past 9 weeks. Now let's put them into practice. This week combines your knowledge of digital footprints (Week 1), privacy settings (Week 8), and threat awareness (Unit 2) into practical advice for sharing content safely.

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Your Photos Are Telling Secrets

Every photo you take with your phone contains invisible data you probably didn't know about. This hidden information is called EXIF data (Exchangeable Image File Format), and as Consumer Reports explains ↗, it can reveal:

• 📍 GPS coordinates — the exact latitude and longitude of where you took the photo
• 📅 Date and time — exactly when the photo was taken
• 📱 Device info — what phone or camera you used
• ⚙️ Camera settings — focus, zoom level, and more
• 🧭 Direction — which way you were facing when you took it

Why This Matters

If you post a photo with GPS metadata intact, anyone who downloads that photo can extract the coordinates and find the exact location where you took it.

Let's say you take a photo in your bedroom and post it on a forum. Someone could extract the GPS coordinates and know:

• Your home address (down to the specific building)
• What floor you're on
• Potentially which room

Platform Protections (and Their Limits)

The good news: major platforms strip EXIF data when you upload:

• ✅ Instagram removes GPS data from uploads
• ✅ Twitter/X strips EXIF data
• ✅ TikTok removes metadata from videos
• ✅ Snapchat strips location data

But these platforms DON'T protect you:

• ❌ Discord (images shared in DMs and servers keep EXIF data)
• ❌ Email attachments (full metadata preserved)
• ❌ Direct file sharing (AirDrop, Google Drive, Dropbox)
• ❌ Forums and smaller websites

Proton's guide to EXIF data ↗ provides additional practical advice on understanding and removing this metadata before sharing photos online.

How to Check and Remove EXIF Data

On iPhone:

Settings → Privacy & Security → Location Services → Camera → set to "Never"

On Android:

Camera App → Settings → toggle off "Store location"

To check existing photos:

• iPhone: Open photo → tap the ⓘ button → see location on map
• Android: Open photo → Details/Info → see location
• Online: Use exifdata.com or jimpl.com

🎯 Key takeaway: Always strip location data from photos before sharing them on platforms that don't automatically remove it, especially Discord, email, and file-sharing services. Or better yet, disable location on your camera altogether.