[Blabber] Killer USB stick

Peter S. Shenkin shenkin at gmail.com
Sun Dec 4 23:15:41 UTC 2016


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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