The National Security Agency (NSA), set up to combat foreign and domestic intelligence threats to the US, has had its reputation turned upside down since whistleblower Edward Snowden began to leak details of its clandestine activities. In the past year, Snowden's leaks have revealed more than 40 separate intelligence campaigns undertaken by the NSA or its UK allies at GCHQ. Among the most infamous was the news the NSA had been infiltrating the data centres of US technology companies - including Facebook, Microsoft and Google - and snatching user data from the traffic. Upstream and PRISM, the names of the surveillance operations that conducted those clandestine acts, caused outrage throughout the technology industry and the world. People began to wonder if their data was truly safe in the hands of the big companies and on the internet. The ripples of that discovery can still be felt today, as companies attempt to side-step their involvement or relocate their services to assuage worried customers. Yet those two operations were only part of myriad of projects the NSA and GCHQ have undertaken. The details of many more have been released by Snowden over the past year, some of which you might never even have heard of. Angry Birds Nowhere is safe from the prying eyes of government agencies, it seems, not even much-loved mobile game Angry Birds.

As soon as a player opened up the game and began their bird-slinging adventures, algorithms within the game's code relayed their age, sex and other information to intelligence agents. This is according to documents leaked from GCHQ, which revealed how it and the NSA had been working on ways to tap into mobiles and collect data through apps. Not just Angry Birds fell foul of the surveillance program: Google Maps, Facebook, Twitter and LinkedIn were also targeted. "It effectively means that anyone using a smartphone is working in support of a GCHQ system," a secret 2008 report by the British agency said. NoseySmurf Also known by the names "TrackerSmurf" and "DreamySmurf", the NoseySmurf project tied into the Angry Birds scheme by tapping into mobile phones to scrape data from users. The NSA spent over $1 billion (580 million) in its search to find more efficient tracking and piggybacking methods for infiltrating targeted devices. In one top-secret presentation, the agency describes a victim uploading an image to Facebook from their phone as a "Golden Nugget!!" From the simple act of someone uploading a picture to a social media site, later slides say, agents could glean a victim's contacts, location, gender, age, income, ethnicity, education level and even number of children. HappyFoot HappyFoot was the codename for an operation designed to track internet users' movements by piggybacking onto their cookies and location data. When a consumer visits a site cookies are enabled on their computer, allowing the site's company to tailor advertisements to them, something government snoops were keen to exploit. Slides released by Snowden and published by the Washington Post revealed the NSA had been latching onto these cookies in order to identify possible targets for further hacking operations. Using a unique cookie from Google called PREF, intelligence agents could pick out one person from a sea of internet data in order to focus on them specifically. The NSA slides indicated that Google complied with this action entirely after being compelled to by the US government. Squeaky Dolphin There's a prize for anyone who can understand the reasoning behind this codename. Squeaky Dolphin was an initiative thought up by the UK's GCHQ. It involved tapping into the cables carrying the world's web traffic in order to monitor what people are up to on social media.