[Blabber] Killer USB stick

Robby O'Connor robby.oconnor at gmail.com
Mon Dec 5 04:18:22 UTC 2016


Oh wait -- nevermind -- ignore this :)

On 12/04/2016 06:15 PM, Peter S. Shenkin wrote:
> Hey Robbie,
> 
> Why would it be a bad idea to make a device that would prevent these killer USB sticks from killing your computer? This is what James was suggesting....
> 
> -P.
> 
>> On 04 Dec 2016, at 5:55 PM, Robby O'Connor <robby.oconnor at gmail.com> wrote:
>>
>> Can we not and say we did? Because this sounds like a bad idea. I generally distrust people with devices like this.
>> On 12/03/2016 06:59 PM, James Carpino via Blabber wrote:
>>> Well, so we could put together and sell an
>>> anti-anti-computer-dongle-dongle.  Sounds like a good idea.
>>>
>>> James
>>>
>>>
>>>
>>>
>>> ------------------------------------------------------------------------
>>> *From:* Michael Robinson <elvagante at gmail.com>
>>> *To:* Hack Manhattan! <blabber at list.hackmanhattan.com>
>>> *Sent:* Saturday, December 3, 2016 6:24 PM
>>> *Subject:* Re: [Blabber] Killer USB stick
>>>
>>> Crowbar:  series fuse and a shunt clamp. I can only think that a fuse
>>> has negligible effect on bandwidth.  There are commercially available
>>> crowbar chips for protecting telecommunications equipment from lightning
>>> surges, I googled it.  Maybe not small and cheap enough for USB ports,
>>> but that's not to say you couldn't produce such a thing.
>>>
>>> On Dec 3, 2016 1:36 PM, "Guan Yang" <guan at hackmanhattan.com
>>> <mailto:guan at hackmanhattan.com>> wrote:
>>>
>>>    There are integrated isolators available for USB. Some are based on
>>>    giant magnetoresistance, but there are other methods too, like the
>>>    good old transformer.
>>>
>>>    Here's one for full speed:
>>>
>>>    http://cds.linear.com/docs/en/ datasheet/2884fb.pdf
>>>    <http://cds.linear.com/docs/en/datasheet/2884fb.pdf>
>>>
>>>    I couldn't find any integrated solutions for high speed, but I think
>>>    it's possible. Gigabit Ethernet is (magnetically) isolated so you
>>>    can always serialize through that. Or you can go through a set of
>>>    fiberoptic transceivers.
>>>
>>>    Here's an overview of various techniques:
>>>
>>>    http://www.digikey.com/en/ articles/techzone/2015/aug/
>>>    digital-isolation-devices- find-pervasive-role-in-energy-
>>>    harvesting-applications
>>>    <http://www.digikey.com/en/articles/techzone/2015/aug/digital-isolation-devices-find-pervasive-role-in-energy-harvesting-applications>
>>>
>>>    On Dec 3, 2016, at 13:11, Michael Robinson <elvagante at gmail.com
>>>    <mailto:elvagante at gmail.com>> wrote:
>>>
>>>>    The writer suggests opto-isolators to protect against killer usb.
>>>>    Not.
>>>>    Opto-isolators are slooooooow.  Like a few tens of kilohertz
>>>>    bandwidth at most.
>>>>    Crowbar circuit, anyone?
>>>>
>>>>    On Sat, Dec 3, 2016 at 12:48 AM, Peter S. Shenkin
>>>>    <shenkin at gmail.com <mailto:shenkin at gmail.com>> wrote:
>>>>>    Sounds like a good Maker Faire project.   ;-)
>>>>>
>>>>>    http://arstechnica.com/ gadgets/2016/12/usb-killer-
>>>>>    fries-devices/
>>>>>    <http://arstechnica.com/gadgets/2016/12/usb-killer-fries-devices/>
>>>>>
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