Related papers: Arbitrary classical privicy amplification can be u…

This paper has been withdrawn by the author.

This paper has been withdrawn.

This paper has been withdrawn by the author.

This paper has been withdrawn by the author(s).The scheme presented is insecure.

This paper has been withdrawn

The article is taken out.

The effect of the random quantum transverse field $\Omega$

This paper is withdrawn. See quant-ph/9806031 for a discussion.

This paper has been withdrawn at the author's request.

This paper has been withdrawn.

This paper has been withdrawn by the author.

This paper has been withdrawn

This paper is withdrawn because the results in the paper are included in a paper to be published in Mathematical and Computer Modelling.

This paper has been withdrawn by the authors because the results obtained have been reported earlier by other authors.

This paper has been withdrawn by the author due to a crucial error in eq.59. I apologize for the inconveniences.

This paper has been withdrawn.

This paper has been withdrawn by the author(s),

The paper is withdrawn.

This paper has been withdrawn. See quant-ph/9806031 for a discussion.

This paper is withdrawn