Re: Address privacy

[Michael Richardson <[e-mail]>]

Ted Lemon <[e-mail]> wrote:
    > On Jan 30, 2020, at 2:03 PM, Michael Richardson <[e-mail]> wrote:
    >> A stable private address may be good enough, if it is okay for the device to
    >> resume the same address whenever it returns to that location. 

    > One thing to think about is /why/ the device needs the same address
    > over and over again.  It’s because something wants to contact it.  In
    > order for something to contact it, that something has to have a pointer
    > to it.   Where did it get the pointer?   If that’s a public place, then
    > privacy is somewhat out the window, but nevermind that for the moment.
    > If it’s a /private/ place, then as long as, when your address changes
    > because you moved locations, you update that registration, then there’s
    > no need to return to the address you had before at a particular
    > location when you return to that location.

Your battery powered device resumed from suspend, noticed it was in the same
place as before, so it configured the same address, and continued with the
TCP/DTLS/QUIC/etc. connection that was still up.

-- 
]               Never tell me the odds!                 | ipv6 mesh networks [ 
]   Michael Richardson, Sandelman Software Works        | network architect  [ 
]     [e-mail]  http://www.sandelman.ca/        |   ruby on rails    [