@misc{cryptoeprint:2011:188,
    author = {Ulrich Rührmair},
    title = {Physical Turing Machines and the Formalization of Physical Cryptography},
    howpublished = {Cryptology ePrint Archive, Report 2011/188},
    year = {2011},
    url = {http://eprint.iacr.org/2011/188},
}