Our Data, Ourselves

Bruce Schneier 05.15.08 | 2:00 PM

In the information age, we all have a data shadow.

We leave data everywhere we go. It’s not just our bank accounts and stock portfolios, or our itemized bills, listing every credit card purchase and telephone call we make. It’s automatic road-toll collection systems, supermarket affinity cards, ATMs and so on.

It’s also our lives. Our love letters and friendly chat. Our personal e-mails and SMS messages. Our business plans, strategies and offhand conversations. Our political leanings and positions. And this is just the data we interact with. We all have shadow selves living in the data banks of hundreds of corporations’ information brokers — information about us that is both surprisingly personal and uncannily complete — except for the errors that you can neither see nor correct.

What happens to our data happens to ourselves.

This shadow self doesn’t just sit there: It’s constantly touched. It’s examined and judged. When we apply for a bank loan, it’s our data that determines whether or not we get it. When we try to board an airplane, it’s our data that determines how thoroughly we get searched — or whether we get to board at all. If the government wants to investigate us, they’re more likely to go through our data than they are to search our homes; for a lot of that data, they don’t even need a warrant.

Who controls our data controls our lives.

It’s true. Whoever controls our data can decide whether we can get a bank loan, on an airplane or into a country. Or what sort of discount we get from a merchant, or even how we’re treated by customer support. A potential employer can, illegally in the U.S., examine our medical data and decide whether or not to offer us a job. The police can mine our data and decide whether or not we’re a terrorist risk. If a criminal can get hold of enough of our data, he can open credit cards in our names, siphon money out of our investment accounts, even sell our property. Identity theft is the ultimate proof that control of our data means control of our life.

We need to take back our data.

continues @ Wired