Re: [Momipriv] RE: [Mobopts] Re: [Mip6] Privacy requirements for Mobile IPv6

Hi Greg,

On 16-Mar-05, at 9:31 AM, Greg Daley wrote:

> > > I think that no set of L2 addresses can outlast

=> IMHO, the relation should be reflexive if you want real anonymity. Otherwise,
you'll get no advantage in return (I am not saying that you cannot do it).

> I'll talk about this below.

=> My concern is that while you can change your L2IDs during one L3ID lifetime, you get nothing in return. We have described this scenario in the
threat model draft when we applied it to the MAC layer. Such scenario breaks the *unlinkability* (as defined in the problem statement draft section
2 - page 4) since you will be always identified via your L3ID.

> Thus the lifetime of an L2ID could be as long as the L3ID (or

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=> OK. But how you achieve "untraceability" while keeping the same IP address? (Consider the case where you have _many_ bad guys located in different places in a public WLAN).

Regards,

Wassim H.