Do iOS devices support Trusted Computing in hardware? If so is it accessible to userspace apps?
If so, you could store your phones secret in a write-only register. For the profoundly paranoid, even the duplication of your storage would not yield your phone's secret, The Bad Guy would need your personal phone. Modern Macs - to the best of my knowledge - provide trusted computing chips, on can access them from userspace with a modest bit of code. Michael David Crawford P.E., Consulting Process Architect mdcrawf...@gmail.com http://mike.soggywizard.com/ One Must Not Trifle With Wizards For It Makes Us Soggy And Hard To Light. On Fri, Sep 18, 2015 at 3:12 AM, Maxthon Chan <m...@maxchan.info> wrote: > The "over-the-shoulder" issue can be avoided using what is effectively a > Diffie-Hellman on top of QR codes. This can be done using front-facing > cameras on two devices placed face-to-face. > > Sent from my iPhone > >> On Sep 18, 2015, at 00:46, Pascal J. Bourguignon <p...@informatimago.com> >> wrote: >> >> >> >>> On 17/09/15 17:32, Michael David Crawford wrote: >>> And what the man said: I myself experience seizures in which I lose >>> consciousness for as long as three weeks. Before they were diagnosed >>> I would experience seizures while driving my car then suddenly find >>> myself in unfamiliar places without any clue how I got there. >>> >>> I don't know for sure but strongly suspect that modern computer user >>> interfaces caused my seizure disorder as well as that of my cousin. >>> Seizures are not otherwise found among any of our blood relatives. >> >> But then if you don't use the whole screen, but only the area that >> should be in front of the camera of the superposed phone, then users >> shouldn't be subjected to much stroboscopic light. >> >> Having the objective so close from the light source does not allow >> the camera to distinguish pixels; for example, a black to white >> transition takes about 1/10 of the height of the camera view. >> But this means that you might still able to transmit about ten pixels at >> once, >> and you can multiply that by a number of color that you can detect reliably >> being that out of focus. Basically, I would expect 8 colors to be clearly >> distinguishable. Actually, probably more colors should be distinguishable, >> if you can filter out the interferences due to the grid of the camera vs. >> the grid of the screen. So assume 4 bits for the color, and 9 areas, >> that's 36 bit/moment, and you should be able to do 30 moment/second, >> for a total of 1080 bit/second. A little less for ECC, about 1 KB/s >> is not too bad. It's good enough to transmit a good private key, and then >> transfer the data thru wifi. >> >> >> Of course, if you move the camera out to focus on the screen, then >> you can transmit at a higher speed things like QR codes, but they >> could also be seen over the shoulder by high resolution cameras. >> >> -- >> __Pascal J. Bourguignon__ >> http://www.informatimago.com/ >> >> _______________________________________________ >> >> Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) >> >> Please do not post admin requests or moderator comments to the list. >> Contact the moderators at cocoa-dev-admins(at)lists.apple.com >> >> Help/Unsubscribe/Update your Subscription: >> https://lists.apple.com/mailman/options/cocoa-dev/max%40maxchan.info >> >> This email sent to m...@maxchan.info > > _______________________________________________ > > Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/cocoa-dev/mdcrawford%40gmail.com > > This email sent to mdcrawf...@gmail.com _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
