Re: Confirmation of Shannon's Mistake about Perfect Secrecy of One-time-pad

On Nov 6, 7:49 pm, wangyong <hell...@xxxxxxx> wrote:

how can you use the condition c is fixed to compute, it is not a
value,

Agreed. The condition "c is fixed" is not a value. C has
two possible values. So you have to compute the probablity
distributions twice. You assume that the value
of C is fixed. You then calculate the probablity
distributions for one possible value of C assuming the value of
C is fixed. You then calculate the probability distributions for the
other
possible value of C assuming the value of C is fixed.
In both case you find that the probability distribution on M is
unchanged.
You get two different probability distributions for K, but neither is
uniform.

- William Hughes

.

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