The government has sought to “reassure” us that it is only tracking “metadata” such as the time and place of the calls, and not the actual content of the calls.
But technology experts say that “metadata” can be more revealing than the content of your actual phone calls.
For example, the ACLU notes:
A Massachusetts Institute of Technology study a few years back found that reviewing people’s social networking contacts alone was sufficient to determine their sexual orientation. Consider, metadata from email communicationswas sufficient to identify the mistress of then-CIA Director David Petraeus and then drive him out of office.
The “who,” “when” and “how frequently” of communications are often more revealing than what is said or written. Calls between a reporter and a government whistleblower, for example, may reveal a relationship that can be incriminating all on its own.
Repeated calls to Alcoholics Anonymous, hotlines for gay teens, abortion clinics or a gambling bookie may tell you all you need to know about a person’s problems. If a politician were revealed to have repeatedly called a phone sex hotline after, no one would need to know what was said on the call before drawing conclusions. In addition sophisticated data-mining technologies have compounded the privacy implications by allowing the government to analyze terabytes of metadata and reveal far more details about a person’s life than ever before.
The Electronic Frontier Foundation points out:
What [government officials] are trying to say is that disclosure of metadata—the details about phone calls, without the actual voice—isn’t a big deal, not something for Americans to get upset about if the government knows. Let’s take a closer look at what they are saying:
- They know you rang a phone sex service atand spoke for 18 minutes. But they don’t know what you talked about.
- They know you called the suicide prevention hotline from the Golden Gate Bridge. But the topic of the call remains a secret.
- They know you spoke with an HIV testing service, then your doctor, then your health insurance company in the same hour. But they don’t know what was discussed.
- They know you received a call from the local NRA office while it was having a campaign against gun legislation, and then called your senators and congressional representatives immediately after. But the content of those calls remains safe from government intrusion.
Sorry, your phone records—oops, “so-called metadata”—can reveal a lot more about the content of your calls than the government is implying. Metadata provides enough context to know some of the most intimate details of your lives. And the government has given no assurances that this data will never be correlated with other easily obtained data.
- They know you called a gynecologist, spoke for a half hour, and then called the local Planned Parenthood’s number later that day. But nobody knows what you spoke about.