Fixed build

paper/tweetverif.tex

@@ -23,7 +23,7 @@
 \ifpublic
     \author{
         \IEEEauthorblockN{Peter Schwabe}
-        \IEEEauthorblockA{Max Planck Institute for Security and Privacy (DE) \& Radboud University (NL)
+        \IEEEauthorblockA{Max Planck Institute for Security and Privacy (DE) \& Radboud University (NL)}
         \and
         \IEEEauthorblockN{Beno\^it Viguier}
         \IEEEauthorblockA{Radboud University (NL)}