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Date: Fri, 8 Aug 2014 07:00:13 -0700
From: Greg KH <greg@...ah.com>
To: oss-security@...ts.openwall.com
Subject: Re: BadUSB discussion
On Fri, Aug 08, 2014 at 09:56:34AM -0400, Daniel Kahn Gillmor wrote:
>
> For example, you could register keyboards by serial number with the
> system,
Most USB keyboards in the system do not have a unique serial number.
Heck, most USB devices in the system do not have a unique serial number,
the only USB device that is required to do so is a USB printer,
everything else is free to not have one at all, or have the same serial
number for all devices made of that type.
Never treat a USB serial number as "unique", except for a USB printer,
sorry.
greg k-h
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