X-Git-Url: https://bilbo.iut-bm.univ-fcomte.fr/and/gitweb/rairo15.git/blobdiff_plain/9fc003099dc86caaa2ccf0645be2764c81418534..b14071948f5418eda195be08e12edc746770f7de:/prng.tex?ds=inline diff --git a/prng.tex b/prng.tex index 0667cca..3776d09 100644 --- a/prng.tex +++ b/prng.tex @@ -1,13 +1,13 @@ -Let us finally present the pseudorandom number generator $\chi_{\textit{15Rairo}}$ +Let us finally present the pseudorandom number generator $\chi_{\textit{15Rairo}}$, which is based on random walks in $\Gamma_{\{b\}}(f)$. More precisely, let be given a Boolean map $f:\Bool^{\mathsf{N}} \rightarrow \Bool^\mathsf{N}$, a PRNG \textit{Random}, -an integer $b$ that corresponds an iteration number (\textit{i.e.}, the length of the walk), and +an integer $b$ that corresponds to an iteration number (\textit{i.e.}, the length of the walk), and an initial configuration $x^0$. Starting from $x^0$, the algorithm repeats $b$ times -a random choice of which edge to follow and traverses this edge -provided it is allowed to traverse it, \textit{i.e.}, +a random choice of which edge to follow, and traverses this edge +provided it is allowed to do so, \textit{i.e.}, when $\textit{Random}(1)$ is not null. The final configuration is thus outputted. This PRNG is formalized in Algorithm~\ref{CI Algorithm}. @@ -47,14 +47,14 @@ Sect.~\ref{sec:hypercube}. Notice that the chaos property of $G_f$ given in Sect.\ref{sec:proofOfChaos} only requires that the graph $\Gamma_{\{b\}}(f)$ is strongly connected. -Since the $\chi_{\textit{15Rairo}}$ algorithme -only adds propbability constraints on existing edges, +Since the $\chi_{\textit{15Rairo}}$ algorithm +only adds probability constraints on existing edges, it preserves this property. For each number $\mathsf{N}=4,5,6,7,8$ of bits, we have generated -the functions according the method -given in Sect.~\ref{sec:SCCfunc} . +the functions according to the method +given in Sect.~\ref{sec:SCCfunc}. For each $\mathsf{N}$, we have then restricted this evaluation to the function whose Markov Matrix (issued from Eq.~(\ref{eq:Markov:rairo})) has the smallest practical mixing time. @@ -69,10 +69,10 @@ it is obtained as the binary value of the fourth element in the second list (namely~14). In this table the column -which is labeled with $b$ (respectively by $E[\tau]$) +that is labeled with $b$ (respectively by $E[\tau]$) gives the practical mixing time -where the deviation to the standard distribution is less than $10^{-6}$ -(resp. the theoretical upper bound ofstopping time as described in +where the deviation to the standard distribution is lesser than $10^{-6}$ +(resp. the theoretical upper bound of stopping time as described in Sect.~\ref{sec:hypercube}). @@ -214,7 +214,9 @@ If the value $\mathbb{P}_T$ of any test is smaller than 0.0001, the sequences ar and the generator is unsuitable. Table~\ref{The passing rate} shows $\mathbb{P}_T$ of sequences based on discrete chaotic iterations using different schemes. If there are at least two statistical values in a test, this test is marked with an asterisk and the average value is computed to characterize the statistics. -We can see in Table \ref{The passing rate} that all the rates are greater than 97/100, \textit{i. e.}, all the generators pass the NIST test. +We can see in Table \ref{The passing rate} that all the rates are greater than 97/100, \textit{i.e.}, all the generators +achieve to pass the NIST battery of tests. + \begin{table}