Smartphones and sensors

A major difference between a computer and a smartphone, is that a smartphone contains a great amount of sensors that can track, record, and reveal many aspects of your private life. Usually smartphones can record:

• locations (GPS)
• sounds (microphones)
• images (cameras)
• acceleration and movement
• compass
• magnetic fields
• light (luminosity sensors)

Smartphones can also usually communicate, send and receive all kinds of data distantly via:

• GSM telephony networks
• wifi networks
• bluetooth
• RFID chip readers (the kind of chips that are in credit card, id card, public transportation pass...)