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* Random walk:
:<math>w_i^+=g(w_i+x_i\Theta(\sigma_i\tau)\Theta(\tau^A\tau^B))</math>
Where:
:<math>\Theta(a,b)=0</math> if <math>a \ne b</math> otherwise <math>\Theta(a,b)=1</math>
And:
:<math>g(x)</math> is a [[Stochastic_process|stochastic function]] that keeps the <math>w_i</math> in the range <math>{-L, -L+1,...,0,...,L-1,L}</math>
=== Attacks and security of this protocol ===
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