Under certain assumptions. This method relies on making its assumptions expensive to violate. Which is good enough in practice...
...unless you're dealing with an attacker with vastly more resources than you, and a will to spend it. It's always worth keeping in mind that the way magic tricks work is usually because the performer invested much more time and effort in preparation and practice than anyone in the audience would consider reasonable.
...unless you're dealing with an attacker with vastly more resources than you, and a will to spend it. It's always worth keeping in mind that the way magic tricks work is usually because the performer invested much more time and effort in preparation and practice than anyone in the audience would consider reasonable.