The former head of the CIA has said "we kill people based on metadata", but as Australia introduces new data retention laws, the country's security chief says he's "not quite sure" what the fuss is about. So what is the truth behind data retention, and why does it matter?
To learn what the NSA can glean from metadata, Stanford students developed Metaphone, an app that analyzes phone records. How sensitive was the uncovered info? CNET's Sumi Das reports.
Make sure you're not communicating more than you intend to when sharing files and uploading images by excising some of the data about your data.
A study conducted by Stanford University graduate students has demonstrated that a lot of personal information can be gleaned just based on the phone calls you make.
Apple filed a patent application for a method to get and add metadata to files automatically using social networks. Because who wants to sit around entering it manually?
Imagine if there was a permanent, unchangeable barcode applied to every single piece of digital data you made. A consortium has issued a manifesto for making metadata persist forever.
BitTorrent's new instant messaging program doesn't store metadata and offers end-to-end encryption.
As promised, the American Civil Liberties Union appeals a ruling that found the NSA's bulk collection of phone metadata to be legal and a "vital tool."
A federal judge issues -- and then stays -- a preliminary ruling that the NSA's bulk collection of US citizens' phone metadata violates expectations of privacy.