Snowden revelations 'unsurprising'
Earlier this week, ex-CIA employee Edward Snowden leaked sensitive information about US phone and internet surveillance programmes.
The Today programme's Simon Jack has been speaking to Dr Jarno Limnell, the director of cyber security for Stonesoft, about how this episode may change the way we use the internet.
Dr Limnell said: "Snowden's revelations didn't surprise me at all. We have known for years that these kind of activities are happening, we just don't know how widely these are being done.
"We have to be more cautious about how we behave on the internet, and what kind of information we share."
First broadcast on the Today programme on Friday 14 June.
- BBC News