Intelligence whistleblower Edward Snowden is likely to reveal much more information about the global surveillance programs of the US National Security Agency, says WikiLeaks publisher Julian Assange.

“I believe we will see a lot more detail, a lot more information," Mr Assange said on Friday.

NSA whistleblower Edward Snowden. Credit:Reuters

He said Mr Snowden's disclosures of US signals intelligence and internet surveillance programs published by The Guardian and The Washington Post newspapers offered a “bird's-eye perspective” but the fine detail was essential for the leaks to achieve lasting political impact.

“We've seen matters at a high level. Now we need to go down to the level of countries, organisations and individuals, so they can see that they have been specifically targeted or caught up in the NSA's dragnet surveillance.”