Jonathan Cooper says:
No - it just makes the point that there is almost nothing which is "not forgeable" with a suitable expenditure of effort & resources.
That depends on definitions. For instance, if I say "without stealing a copy of our one-time pad, or using coercion on one or the other of us, it would be impossible to forge a message between myself and my correspondant who shares a one-time pad with me, given that we properly use the one-time pad only once", I'm being reasonably correct -- no amount of expenditure of resources will do better for you than a random guess. It isn't true that "anything can be done given enough effort". Some things cannot be done period, and some things cannot be done given that we live in a finite universe. Myself, I worry about the physical security of my keys a lot more than about someone factoring them in most instances. Perry