What is privacy2.1 — Speculative Design
What is the privacy?
a state in which one is not observed or disturbed by other people.
the state of being free from public attention.
Great explanation of the subject we can find on the Privacy International’s website: https://www.privacyinternational.org/node/54
But what exactly could be considered as private information? For everyone, there are personal understanding of the boundaries. There are also some classifications, such as ISO: http://www.iso27001security.com/ISO27k_Model_policy_on_information_classification.pdf or custom policies of particular organisations: http://www.weber.edu/iso/dataclassification.html
A nice video by Privacy International could explain a bit more about privacy: