Related papers: Relation between quantum tunneling times for boson…
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This paper has been withdrawn by the author due to the incorrect argument for the security.
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This paper has been withdrawn as it has been superseded by postings arXiv:quant-ph/0702147 and arXiv:0712.2935
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This paper has been withdrawn by the author. Proofs of two propositions need more details.
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This paper has been withdrawn by the authors due to a crucial error.
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This paper has been withdrawn, since it contains a corollary with impossible consequences and the source of an error is currently unknown.
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