[Blabber] Killer USB stick

Guan Yang guan at hackmanhattan.com
Sat Dec 3 18:36:33 UTC 2016


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

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

> On Dec 3, 2016, at 13:11, Michael Robinson <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> wrote:
>> Sounds like a good Maker Faire project.   ;-)
>> 
>> http://arstechnica.com/gadgets/2016/12/usb-killer-fries-devices/
>> 
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