24 November 2009

A Taxonomy of Social Networking Data

(Bruce Schneier)
At the Internet Governance Forum in Sharm El Sheikh this week, there was a conversation on social networking data. Someone made the point that there are several different types of data, and it would be useful to separate them. This is my taxonomy of social networking data.
  1. Service data. Service data is the data you need to give to a social networking site in order to use it. It might include your legal name, your age, and your credit card number.
  2. Disclosed data. This is what you post on your own pages: blog entries, photographs, messages, comments, and so on.
  3. Entrusted data. This is what you post on other people's pages. It's basically the same stuff as disclosed data, but the difference is that you don't have control over the data -- someone else does.
  4. Incidental data. Incidental data is data the other people post about you. Again, it's basically same same stuff as disclosed data, but the difference is that 1) you don't have control over it, and 2) you didn't create it in the first place.
  5. Behavioral data. This is data that the site collects about your habits by recording what you do and who you do it with.