According to information leaked by Snowden, President Dilma Rousseff's communications with aides were intercepted, the computer network of state-run oil company Petrobras was hacked and data on billions of emails and telephone calls flowing through Brazil were monitored by the NSA.
"For our investigation, questioning Snowden is a top priority," said Jose Alberto Freitas, the head of the intelligence sector of Brazil's Federal Police, before a Senate committee investigating the NSA spy programme.
"He could provide technical details that will help our investigation advance."
Ricardo Ferraco, who heads the committee, said that on Thursday he will ask the Russian government for permission to speak to Snowden via a video conference.
Snowden received asylum in Russia in August.
"We have to go to Snowden who is the primary source," Ferraco said, adding that if the committee is not allowed to meet with Snowden, "I doubt our investigations will move forward."
The fallout over the spy programmes led Rousseff to cancel a planned visit to the US, where she was to be the guest of honour for a state dinner.
Rousseff last month spoke at the United Nations General Assembly and called for international regulations on data privacy and limiting espionage programmes targeting the Internet.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
)