Snowden, who is a former US intelligence contractor, has been on the run for past three years, spending the time in exile in Russia.
The leak had fueled a firestorm of an issue, with many coming out in protest against the issue of mass surveillance.
Talking to Britsih newspaper, The Guardian, Snowden said:
He further pleaded that the things that may seem unlawful in letters, but when looked upon morally, ethically and from the results point of view would seem necessary
Snowden has got widespread support for what he did, said that the “public by and large cares more about these issues”.