Ethel and Julius Rosenberg were the first US citizens to be convicted and executed for sharing government secrets during peacetime. Were they innocent?

Danish media says the Danish spy agency helped the U.S. to spy on European politicians from 2012 to 2014.

Who was Mata Hari? Exotic dancer, courtesan, seductress, spy, and femme fatale: Mata Hari was many things to many different people. But she is perhaps best remembered for the fact that she was executed during World War I for espionage.

Beijing is being accused of supporting Chinese officials who hire hackers to steal from individuals and firms worldwide. <br/>

Over recent months, Chinese telecommunications and electronics company, Huawei has found itself at the centre of international controversy. There has been growing fear that Huawei’s equipment can or will be used by the Chinese government...

During the American Revolutionary War some American women disguised themselves as men in order to join the fight, and played a critical role both on the home front and on the battlefield.

The Washington Post reports that an Israeli company sold “military-grade spyware” that can easily bypass a smartphone’s passwords and access all data on that phone.

They called her the Limping Lady. The Allied spy who topped the Nazis’ most wanted list. This is the story of Virginia Hall – one of the most decorated special agents of the Second World War.

Using animals to spy on enemies was an espionage tactic employed by the US during the Cold War - and beyond.