Editing Privacy (section)

===Metadata===
{{main|Metadata}}
{{further|Data re-identification}}

The ability to do online inquiries about individuals has expanded dramatically over the last decade. Importantly, directly observed behavior, such as browsing logs, search queries, or contents of a public Facebook profile, can be automatically processed to infer secondary information about an individual, such as sexual orientation, political and religious views, race, substance use, intelligence, and personality.<ref>{{cite journal|last=Kosinski|first=Michal|author2=Stillwell, D. |author3=Graepel, T. |title=Private traits and attributes are predictable from digital records of human behavior|journal= Proceedings of the National Academy of Sciences|year=2013 |volume=110|issue=15| pages=5802–5805|doi=10.1073/pnas.1218772110|pmid=23479631|pmc=3625324|bibcode=2013PNAS..110.5802K|doi-access=free}}</ref>

{{main|Privacy in Australian law#Telecommunications (Interception and Access) Amendment (Data Retention) Act 2015}}

In Australia, the [[Telecommunications (Interception and Access) Amendment (Data Retention) Act 2015]] made a distinction between collecting the contents of messages sent between users and the metadata surrounding those messages.