| --- Log opened Tue Feb 14 00:00:24 2017 |
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| 00:52 | | * McMartin grumbles at Apple APIs |
| 00:52 | <&McMartin> | This function name is 55 characters long |
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| 16:19 | | * LadyOfLight parses xml in c++, attempts not to fall asleep |
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| 16:32 | <@abudhabi> | Ugh. Python's mysql stuff is so limited. |
| 16:33 | <@abudhabi> | (And broken/unsupported.) |
| 17:13 | | * abudhabi curses encoding to Hell. |
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| 20:01 | <&McMartin> | Well, this is terrifying |
| 20:01 | <&McMartin> | http://fermatslibrary.com/s/when-csi-meets-public-wifi-inferring-your-mobile-pho ne-password-via-wifi-signals |
| 20:20 | <@celticminstrel> | It sure sounds like it would be terrifying, but it's so dense... I'm not sure I really want to read all of that... >_> |
| 20:26 | <&McMartin> | "The motion of your hands entering your Wi-Fi password produces interference that can be used as a side-channel attack on your password" |
| 20:26 | <&McMartin> | Is the high bit |
| 20:38 | <&ToxicFrog> | Just wifi passwords? From the abstract it sounds like this lets you infer any hand movements as long as the phone is connected to wifi |
| 20:38 | <&ToxicFrog> | So the main use is, e.g, figuring out your unlock code or google account password or the like. |
| 20:38 | <@celticminstrel> | Is this Android or iPhone or both? |
| 20:41 | <@ErikMesoy> | Another step towards the future where everything leaks everything to sufficient signal analysis. >_> |
| 20:42 | <@Tamber> | We're already in that future. |
| 20:42 | <@Tamber> | But the magic key words there are "sufficient ${X}" |
| 20:44 | <@ErikMesoy> | Someday: "the screen brightness modifier to electricity consumption can be used as a side-channel attack to to read text being entered from the power cable". |
| 20:44 | <&McMartin> | ... pretty sure that power draw was one of the first remote side channels |
| 20:44 | <&McMartin> | You'd monitor during a decryption operation and determine their private key |
| 20:45 | <@ErikMesoy> | McMartin: Pretty sure power draw is not yet a sufficiently detailed side channel to read individual letters appearing on display, though. |
| 20:46 | <&McMartin> | Yeah, no, but, well |
| 20:46 | <@Tamber> | It just requires sufficient signal analysis. |
| 20:46 | <&McMartin> | Are laptops TEMPEST shielded? |
| 20:51 | <@ErikMesoy> | A decade or two later: The power company's logs are sufficiently detailed for frame-by-frame reconstruction of everything you had on your screen. |
| 20:51 | <@Tamber> | "...shit." |
| 20:52 | <@Tamber> | Cue rotary converter in the power feed~ |
| 20:53 | <@Tamber> | (Two months later, cue "Logs sufficiently detailed to pick up data, via harmonics coupled through the rotary converter.") |
| 20:54 | <@ErikMesoy> | Cue "buy three copies of PC, plug into splitter in same outlet, put hyperactive children on other two". |
| 20:55 | <@Namegduf> | This stuff tends to assume everything else is held perfectly still while the analysis is done and the model created. A model could be made in the presence of noise but I imagine it'd only be able to faintly hint at what large spaces are more likely than others in the absence of lots of repeats or lots of modeling of other things. |
| 20:57 | <@ErikMesoy> | Repeats like monitor refresh rate? (New hotness: etch-a-sketch style monitors drawing only as needed.) |
| 20:58 | <@Namegduf> | There'd be lots of possible monitor states with the same power draw. |
| 20:58 | <@Namegduf> | I would absolutely believe they could do that analysis- if they could hold everything else on the screen constant and known while they trained their models. |
| 20:59 | <@Namegduf> | In real situations, you'd be maybe able to say some parts of the space of passwords were more likely than others, given distributions over the state of the rest of the screen. |
| 20:59 | <@Namegduf> | Would need more data. |
| 21:00 | <@Namegduf> | Not that that can't be done, but I think that's the big barrier to making any of these side channel things practical. |
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| 21:57 | <~Vornicus> | Yeah, I know my dad worked in places where for instance there was noise generators so keyboard couldn't be heard. |
| 21:58 | <~Vornicus> | I've used software with tempest prevention built in. Dunno how good it is against modern signal analysis but it did things like use #aaa and #555 |
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| 22:28 | <&[R]> | What's #aaa and #555? |
| 22:29 | <~Vornicus> | colors |
| 22:29 | <@ErikMesoy> | Color codes for light grey and dark grey, I believe. |
| 22:29 | <~Vornicus> | they have bit patterns 1010 and 0101 respectively |
| 22:42 | | LadyOfLight [catalyst@Nightstar-bt5k4h.81.in-addr.arpa] has quit [[NS] Quit: Leaving] |
| 22:58 | <&McMartin> | CGA colors 7 and 8 |
| 23:14 | <@gnolam> | I'm mostly wondering what uses 12-bit color. |
| 23:17 | <~Vornicus> | gnolam: css allows specification of 12-bit color in situations where that would be sufficient: #abc is #aabbcc is rgb(170, 187, 204) |
| --- Log closed Wed Feb 15 00:00:25 2017 |