Re: Ross's TCPA paper

Ross Anderson wrote:

I don't believe that the choice is both privacy and TCPA, or neither.

Neither do I.

There may be symmetry when we consider the problem as theoretical computer scientists might, as an issue for abstract machines.

If one-way functions exist there is no such symmetry. While in theory such functions cannot be proved to exist, in practice they are used a lot in crypto etc. -- Peter Fairbrother