Intro: In 2003 martin ludvigsen, thomas riisgaard, simon larsen and I participated in the first convivio summer school in rome. The summer school lasted for two weeks in september and included 45 sudents (mainly phd students) from 16 different contries and with very different backgrounds but with the commen goal to work within the field of interaction design. During the two weeks we worked in three groups under three workshop/studio leaders. I enjoyed every day at the summer school both due to the work and to the nice people participating. A video shows parts of the work process (26.6mb). I was in the same group as thomas led by ivica mitrovic. The green group as we were called worked on alternative use of surveillance systems in cities. We came up with three different concepts and scenarios that suggested a new and more positive use of the huge surveillance infrastructures. Digital Traces: Common for all we presented was the discussion on digital traces and an awareness on these to either change your behaviour or use them as an information ressource. These could be when we are using the ATM, when we pass a surveillance camera, when we are using our credit card, when we are using our mobile phone, when we are in front of other people taking pictures, when we register at the hotel and many more. These traces led to a range of issues that we discussed and defined in new ways as shown in the figure below. Issues Traditional Opinion Our Opinion Privacy big brother use it for yourself Control controlled against your will indirect control, random Experience paranoia situational, playful Ominous Technology who is watching you artful, expressive, ambiguity Observation you are being watched views, share & compare, interprete The Digital Traces describes some of the surveillance infrastructures and systems that we used as a design material and constraint in our work. See the animation here (3.4mb). M.O.D: The M.O.D commercials describe a system called memory on demand (MOD) that basically works as a spare brain. The system can be entered just like a regular atm machine and from here you can access what could be lost memories or just situations from another visual perspective. See the three commercials lost (13.3mb), share (5.3mb) and model (3.5mb). Digital Self: The DigitalSelf works much in the same way as the M.O.D however the system compiles a summary from your day that you can print onto physical paper. This reciept contains parts of emails, sms messages, surveillance images and other traces that you layed out during your day. Using the system you will end up having a scrab book of small rolls of fragments of your life. See the flash demo here (0.6mb). City Experience: The City Experience was made as a rough 3D sketch using the 3D city model from the intro animation. The scenario describes how an awareness on your digital traces can be used to act in the public domain. The couple leaves traces on purpose or act invisible by avoiding actions that lead to a possible discovery by the other part. See the city experience scenario here (11.7mb).