The NewScientist online website ran an article on the 2nd November 2011 about new surveillance method relating to a touchscreen spy that reads text and email messages on your smart phone.
"......dubbed iSpy, that can identify text typed on a touchscreen from video footage of the screen or even its reflection in windows or sunglasses. Video from an ordinary mobile phone camera can be used to spy on a person from 3 metres away. And a snoop with a digital SLR camera that shoots HD video could read a screen up to 60 metres away."
"Their method exploits a feature meant to aid typing on small touchscreens: magnified keys. Letters on a virtual Android or iPhone keyboard pop up in larger bubbles when pressed. The program analyses video footage and identifies the letters based on the bubble locations on screen. Pop-ups for neighbouring letters like E and R can overlap, so the program assigns an accuracy probability to each detected letter. The program correctly identifies letters more than 90 per cent of the time.."
Screenspy program can read texts and emails.html