NSA stores metadata of millions of web users for up to a year, secret files show

The National Security Agency is storing the online metadata of millions of internet users for up to a year, regardless of whether or not they are persons of interest to the agency, top secret documents reveal.

Metadata provides a record of almost anything a user does online, from browsing history – such as map searches and websites visited – to account details, email activity, and even some account passwords. This can be used to build a detailed picture of an individual's life.

The Obama administration has repeatedly stated that the NSA keeps only the content of messages and communications of people it is intentionally targeting – but internal documents reveal the agency retains vast amounts of metadata.

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