The objective of this course is: The objective of this course is

“Where are you”: is this information private or public?

• “Where are you”: is this information private or public?

• Location is the key component of all Location-Based Services (LBS)

• Location is related to identity

• as a husband, I was on the French Riviera (with my wife)
• as a PhD adviser, the secretary said I was “busy”
• my wife changed her profile on Facebook by “Romantic WE on the Riviera”
• my wife is friend with my PhD students
• …

IETF (SIMPLE WG)

• IETF (SIMPLE WG)

• Notions of presence system/server and “presentity” i.e., unique identity in a presence system
• Main security and privacy requirements
• Updating presence information requires a priori authentication and authorization
• Subscribing to/Watching presence information requires authentication
• Watching requires compliance with the privacy filtering/policy, incl. authorization
• Confidentiality and integrity of presence information and privacy policy must be ensured
• (from Singh et al.)