@article {1321, title = {Can quantum cryptography imply quantum mechanics? Reply to Smolin}, year = {2003}, month = {2003/11/11}, abstract = { Clifton, Bub, and Halvorson (CBH) have argued that quantum mechanics can be derived from three cryptographic, or broadly information-theoretic, axioms. But Smolin disagrees, and he has given a toy theory that he claims is a counterexample. Here we show that Smolin{\textquoteright}s toy theory violates an independence condition for spacelike separated systems that was assumed in the CBH argument. We then argue that any acceptable physical theory should satisfy this independence condition. }, url = {http://arxiv.org/abs/quant-ph/0311065v1}, author = {Hans Halvorson and Jeffrey Bub} }