Related papers: Security verification for continuous variable quan…

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This paper has been withdrawn while the author verifies the literature.

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This paper was withdrawn on 20.11.97.

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This paper has been withdrawn by the author due to a crucial mistakes.

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This paper has been withdrawn by the authors, due a oversimplified decoherence model.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This paper has been withdrawn by the author due to a crucial error in the submission action.