Linked by Howard Fosdick on Mon 21st Nov 2011 07:48 UTC
Google Last June, CNET disclosed that Google collects and publishes the estimated locations of millions of phones, laptops, and other Wi-Fi devices. All without their owner's knowledge or permission. Google has finally announced how to exclude your home network from this database. Simply append "_nomap" to its name. Details over at CNET. Left unsaid is why the burden is placed on millions of individuals to opt-out, instead of on perpetrator Google.
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RE[5]: Comment by clhodapp
by Alfman on Tue 22nd Nov 2011 00:33 UTC in reply to "RE[4]: Comment by clhodapp"
Alfman
Member since:
2011-01-28

Soulbender,


"A MAC does not need to, and in practice sometimes isn't, globally unique. I know some folks who have managed to end up with two different network cards (from the same manufacturer, of course) with the same MAC address."

I realize that MAC addresses only matter locally, but hardware MAC addresses are intended to be globally unique and manufacturers are not supposed to reuse them. Can you say which manufacturer is reusing addresses and their reason for doing so?


"You have a point there, it doesn't have to be the same forever. Of course, the problem is how you define a session. Is it the time between reboots of the AP? Individual TCP/IP sessions? As I said, it might be possible but not practically feasible for various reasons."

Why is that a problem? A session could be defined as whatever the standard deemed appropriate - including leaving it configurable in firmware. The higher level protocols don't need to be aware of it, there just needs to be a dynamic mapping between them and raw MAC addresses, which we already have as ARP.

Like I said, I wouldn't want to re-engineer 802.11 now that's it's here and working, at least not without a much more compelling reason. But it seems to me that they could/should have avoided the use of unique static identifiers when it was being worked on.

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