Location Based Services

Modern mobile phones store geographic information, GPS coordinates, wifi networks, mobile cells.

IOS

• Stores wifi networks:
  • BSSID, Location, Accuracy, Timestamp, ...
• Stores mobile geo information:
  • your providers cell towers, Cell Numer, Location, ...
• Database without size limit
• Sends data how?
• Correlates with GPS
• Data used ..?

Android

Android's location services stores information for caching reasons in two database files to speed up your GPS fix.

Information stored

Location on your device

• /data/data/com.google.android.location/files
  • cache.wifi
  • cache.cell

Database

• Database is limited to:
  • 200 Wi-Fi entries
  • 50 Cell entries

Value	Type	Description
accuracy	int
confidence	int
latitude	double
longitude	double
readingTime	long

Settings

• Settings -> Location & Security -> Use wireless networks
  • when ticked: stores information in two databases
  • when un-ticked: no information get's stored on your device

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  Location Settings

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  Google informs you that they will use your information