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# Probabilistic QV

Sybil attack is advantageous in QV because the more votes are divided, the more profitable it is. D3LAB suggests PQV which applies a probabilistic model so dividing votes always results in a loss.

Assume that the total number of votes is 100, and a user submitted 10 votes. There is a 10% (

$\frac{10}{100}$

) of chance that his opinion will be reflected, or a 90% ($1-\frac{10}{100}$

)chance that it will not.The expected value of voting in this condition is

$\sqrt{10}\times0.1\approx0.3162$

*. However if the user split the 10 votes in two, the expected value lowered to*$\sqrt{5}\times2\times0.05\approx0.2246$

. This means doing Sybil attack is less beneficial.Last modified 11mo ago