Title: ""Gravitational attacks" on quantum cryptography"
It was thought that the unconditional
security of quantum key distribution under
the Bennett-Brassard protocol can be proven
under the sole assumption that the known laws
of physics are correct.
In the talk I describe a practical attack procedure
that, contrary to previous wisdom,
cannot be proven to fail under the above assumption.
The attack, if performed, can also be seen as an unconventional
way to find experimental clues to quantum gravity.