Re: Avoiding IBAC

>> for example with public private keys: Alice can use Bob's public and
>> her own private.
> "The goal is to stop her from making mistakes"
> This approach is not going to help.


[the discussion has moved on, so this is somewhat irrelevant now...]

Sure it could help: she's going to have to think long and hard about
whose public key she uses! Unlikely to pick the wrong one!

Now, the overall usability of it *will probably really suck* and will
push people to do end-runs around it, so in *that* sense in the long
run it won't help :-)