Related papers: Verifiable quantum oblivious transfer protocol bas…

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This paper has been withdrawn by the authors, due a oversimplified decoherence model. It will be substituted by a new work.

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This paper has been withdrawn for the reasons mentioned in the Comments.

This paper has been withdrawn by the authors; replaced by arXiv:0705.2531v2 [quant-ph].

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This paper has been withdrawn due to security loophole. We thank Dr G. P. he for pointing this to us.

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This paper has been withdrawn by the authors because the results obtained have been reported earlier by other authors.

The paper has been withdrawn by the author because the result obtained has been reported earlier by other authors.

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This paper has been withdrawn by the author due to an error.

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This paper has been withdrawn by the author. This paper is now obsolete. For a solution please see: arXiv:/1205.4265.