diff --git a/symbols.tex b/symbols.tex
index b5f3ba1..99193ca 100644
--- a/symbols.tex
+++ b/symbols.tex
@@ -2,22 +2,22 @@
 \addcontentsline{toc}{chapter}{List of Symbols}
 
 \begin{tabular}{ll}
-  \multicolumn{2}{l}{\scbf{General Notations}}      \\
-  TM         & Turing Machine                       \\
-  $\ppt$     & Probabilistic Polynomial Time        \\
-  $\epsilon$ & empty word                           \\
-  \multicolumn{2}{l}{\scbf{Protocols}}              \\
-  PKE        & Public Key Encryption                \\
-  ZK         & Zero-Knowledge                       \\
-  $\NIZK$    & Non-Interactive Zero-Knowledge       \\
-  \multicolumn{2}{l}{\scbf{Security Models}}        \\
-  $\ROM$     & Random-Oracle Model                  \\
-  $\UC$      & Universal Composability              \\
-  \multicolumn{2}{l}{\scbf{Security Assumptions}}   \\
-  $\SIS$     & Short Integer Solution               \\
-  $\LWE$     & Learning with Errors                 \\
-  $\SIVP$    & Shortest Independent Vectors Problem \\
-  $\DLP$     & Discrete Logarithm Problem           \\
-  $\DDH$     & Decisional Diffie-Hellman            \\
+  \multicolumn{2}{l}{\scbf{General Notations}}          \\
+  TM         & Turing Machine                           \\
+  $\ppt$     & Probabilistic Polynomial Time            \\
+  $\epsilon$ & empty word                               \\
+  [1ex] \multicolumn{2}{l}{\scbf{Protocols}}            \\
+  PKE        & Public Key Encryption                    \\
+  ZK         & Zero-Knowledge                           \\
+  $\NIZK$    & Non-Interactive Zero-Knowledge           \\
+  [1ex] \multicolumn{2}{l}{\scbf{Security Models}}      \\
+  $\ROM$     & Random-Oracle Model                      \\
+  $\UC$      & Universal Composability                  \\
+  [1ex] \multicolumn{2}{l}{\scbf{Security Assumptions}} \\
+  $\SIS$     & Short Integer Solution                   \\
+  $\LWE$     & Learning with Errors                     \\
+  $\SIVP$    & Shortest Independent Vectors Problem     \\
+  $\DLP$     & Discrete Logarithm Problem               \\
+  $\DDH$     & Decisional Diffie-Hellman                \\
   $\SXDH$    & Symmetric eXternal Diffie-Hellman
 \end{tabular}