I'm familiar with J3M, but unfortunately none of the current J3M/informacam techniques actually work, as they have no _external_ verifiability. There isn't actually any information which ties the media to a place or a time, it's just information encoded into data which could be applied to any document at any time. By factoring the network, a geotemporal pkey system would address this problem. J3M is good for tying information to a specific device (sort of) - but not to a place or a time.
R On Mon, Aug 26, 2013 at 4:58 PM, Lee Azzarello <[email protected]>wrote: > Informacam > > "InformaCam is a mobile application for Android that enables users to > inflate image and video with extra points of data, or metadata. The > metadata includes information like the user’s current GPS coordinates, > altitude, compass bearing, light meter readings, the signatures of > neighboring devices, cell towers, and wifi networks; and serves to > shed light on the exact circumstances and contexts under which the > digital image was taken. With InformaCam the app starts to behave > almost like Adobe Photoshop or GIMP, supporting non-destructive, > layer-based edits to media built on top of Obscuracam." > > https://guardianproject.info/apps/informacam/ > > There is a sub-project to standardize metadata called j3m. > http://j3m.info/ > > -lee > > On Mon, Aug 26, 2013 at 7:08 PM, Rich Jones <[email protected]> wrote: > > This is a small, unfinished idea I had, but I'd be interested in hearing > any > > feedback anybody here might have to offer. Normally we talk about > > cryptography to secure communications, but this is an idea rather about > > verifying the authenticity of media. > > > > [Quick backround: OpenWatch is a global citizen media network using > mobile > > phones as the basis for a free worldwide press. We care very much about > the > > authenticity of citizen media, and have designed some systems which > attempt > > to improve the verifiability of citizen media.] > > > > The problem is that sometimes media artifacts are presented as a record > of a > > current event, when in fact they from different events. An example of > this > > was when images of a marathon race in Istanbul were presented as images > of > > the recent Occupy Gezi protests. > > > > Now, imagine the globe divided into a grid coordinate system, say 100,000 > > units (or perhaps 232, if IP rather than physical address is to be used). > > Based on their physical location, reporters can contact a server and are > > assigned a key with which to sign or encrypt their media to. This then > ties > > a media object to a physical space. This can be further improved to > include > > both time and space by dividing a space-day into a number of units, > suppose > > 1440, such that different keys would be handed out at different times of > the > > day, thus further tying a document to a moment in time as well. > > > > Does anybody know if any systems like this have ever been discussed or > > designed in the past? I suppose this is somewhat similar to the > RSA-keyfob > > system, although this allows for anonymous access without > pre-arrangement as > > well. > > > > R > > -- ————————————— Rich Jones * OpenWatch* is a global investigative network using mobile technology to build a more transparent world. Download OpenWatch for iOS<https://itunes.apple.com/us/app/openwatch-social-muckraking/id642680756?ls=1&mt=8>and for Android<https://play.google.com/store/apps/details?id=org.ale.openwatch&hl=en> !
