Minimising Information Asymmetry by Using Proxies

Transcription

1 Minimising Information Asymmetry by Using Proxies Anders Kofod-Petersen IMIS Anders Kofod-Petersen Minimising Information Asymmetry by Using Proxies

2 Outline 1 Motivation and Background Motivation FindMyFriends FriendRadar (and Find Peer Anton) The principle 2 Privacy in the AAL domain Mpower and UniversAAL Current situation Using a proxy to minimise asymmetry 3 Summary 2 Anders Kofod-Petersen Minimising Information Asymmetry by Using Proxies

3 Motivation Motivation and Background Motivation Privacy is important when we (deliberately) share data It is even more important when we share sensed data We really like to monitor people, in particular elderly (AAL) "Informed users" tend to prefer coolness over privacy But what about non-competent or non-informed users? 3 Anders Kofod-Petersen Minimising Information Asymmetry by Using Proxies

4 FindMyFriends Motivation and Background FindMyFriends Location-based system implemented at a student festival 2769 registered users 1661 users with registered tags Only privacy mechanism was "blocking a user" Main finding was that the benefits outweighed any negative aspects (n=207, cl 95 %, ci 6.55 %) 4 Anders Kofod-Petersen Minimising Information Asymmetry by Using Proxies

5 Motivation and Background FriendRadar (and Find Peer Anton) FriendRadar (and Find Peer Anton) FriendRadar was a city-wide system that allows you to see the location of your friends Find Peer Anton was the same just "GSM-wide" Privacy mechanism were: 1 Subscribing to another s presence or location information is only possible by mutual sharing. 2 Being invisible stops the user from receiving other users information. 3 Cancelling a subscription removes the cancelled user form the list and marks the cancelling user as offline in other users list. Main finding was that "coolness" outweighed any privacy issues (n=24) 5 Anders Kofod-Petersen Minimising Information Asymmetry by Using Proxies

6 Motivation and Background The principle Principle of minimal asymmetry "A privacy-aware system should minimize the asymmetry of information between data owners and data collectors and data users, by: Decreasing the flow of information from data owners to data collectors and users. Increasing the flow of information from data collectors and users back to the data owners." [Jiang et al., 2002] Decreasing information flow from the data owner improves control. Increasing information flow from the collector provides feedback. 6 Anders Kofod-Petersen Minimising Information Asymmetry by Using Proxies

7 Privacy in the AAL domain MPower and UniversAAL Mpower and UniversAAL MPower was a FP6 project that constructed a collaborative environment for distributed and shared care UniversAAL is a continuation (FP7) of, among others MPower that aim at consolidation one European platform for AAL services 7 Anders Kofod-Petersen Minimising Information Asymmetry by Using Proxies

8 Privacy in the AAL domain Current situation Current situation Service Service Service MPOWER Sensor 5 Sensor 4 Sensor 3 Sensor 2 Sensor 1 8? Anders Kofod-Petersen Minimising Information Asymmetry by Using Proxies

9 Privacy in the AAL domain Using a proxy to minimise asymmetry Using a proxy to minimise asymmetry? 9 Anders Kofod-Petersen Minimising Information Asymmetry by Using Proxies

10 Summary Summary We have seen that "usefulness" often outweighs privacy concerns Some examples of systems that attempts to minimise asymmetry has been described Non-competent and non-informed users are in a special situation Minimising asymmetry has been suggested as a suitable mechanism, also in the AAL domain It has been argued that designing AAL systems to (explicitly) care for proxies is necessary Applying this principle is basically an engineering problem However, the non-technical issues needs to be tackled 10 Anders Kofod-Petersen Minimising Information Asymmetry by Using Proxies