I agree completely with the line of thought from Dick.  There is
the concept of passing groupings of identity values, passing individual
identity values, and then passing the results of comparisons.  All
of this is greatly enhanced in the digital world.

Identifiers Enable Discrimination.
Kim Cameron posted his Second Law of Identity The Minimal Disclosure
Law of IdentityThe solution which discloses the least identifying
information is the most stable, long-term solution.”The thesis here is
that the more identifying information is released, the more a solution
invites abuse by rogue (and ultimately criminal) elements. We will
return to a more rigorous discussion of these dynamics… [Dick Hardt – Blame Canada]