Not only is its calculation as same simple as the bit checkout advantage distillation pr otocol,but also it is an advantaged d egeneration,which make the privacy amplification to be easy even if the Eve s bit error rate is very little.

Advantage degeneration protocol and former advantage distillation protocol have different functions:one means that the mutual information of communication partners is distilled firstly,another that the information of enemy is degenerated firstly.

On the Necessity and Possibility to Establish the Occupatio in the Future Civil Code;