[messaging] Comparing introduction secret schemes (was Re: Unlinkable rendezvous via human-sized keys)

[Trevor Perrin]

On Mon, Mar 24, 2014 at 6:41 AM, Robert Ransom <rransom.8774 at gmail.com> wrote:
> On 3/23/14, Trevor Perrin <trevp at trevp.net> wrote:
>
>> But the main goal here (IMO) is "unlinkable communications", which
>> it's not in opposition too (whether an observer can tell which users
>> are talking).
>
> The security properties which 'Drac'
> (http://freehaven.net/anonbib/#drac-pet2010) attempts to provide seem
> better to me

Could you elaborate?

Drac assumes each user "has a long term identifier IDi that is known
by all her contacts", so it seems to have a similar model of
unlinkable communications / linkable pseudonyms as (e.g.) Pond.

There are lots of differences though, so I'm curious what you
particularly like about this.


Trevor