Add french TOC and ZK part

sec-pairings.tex

@@ -43,8 +43,8 @@ In the aforementioned chapter, we also rely on the following assumption, which g
 
 \begin{definition}[$\SDL$]
   \label{de:SDL} \index{Pairings!SDL}
-  In bilinear groups $(\GG,\Gh,\GT^{})$  of  prime order $p$,  the \emph {Symmetric  Discrete Logarithm} ($\SDL$) problem  consists in, given
-  $(g,\hat{g},g^a,\hat{g}^a) \in \GG \times \Gh$
+  In bilinear groups $\bigl(\GG,\Gh,\GT^{}\bigr)$  of  prime order $p$,  the \emph {Symmetric  Discrete Logarithm} ($\SDL$) problem  consists in, given
+  $\bigl(g,\hat{g},g^a_{},\hat{g}^a_{}\bigr) \in \bigl(\GG \times \Gh\bigr)^2_{}$
   where $a \sample \ZZ_p^{}$, computing $a \in \ZZ_p^{}$. 
 \end{definition}