Radio 4 in Four - How your phone call data can be used to spy on you - ÃÛÑ¿´«Ã½ Sounds

Radio 4 in Four - How your phone call data can be used to spy on you - ÃÛÑ¿´«Ã½ Sounds
How your phone call data can be used to spy on you
A new paper looks into exactly what the act of making a phone call can reveal.