diff --git a/webinterface/blaukraut/genpw.sh b/webinterface/blaukraut/genpw.sh
index df174dc..380168d 100755
--- a/webinterface/blaukraut/genpw.sh
+++ b/webinterface/blaukraut/genpw.sh
@@ -27,7 +27,7 @@ fi
 
 STAMP=`date +%Y-%m-%dT%T`
 FILE="$PWD/$USER.$STAMP.keyhash"
-PASSPHRASE=`tr -dc _a-z0-9 </dev/urandom | head -c 78`
+PASSPHRASE=`tr -dc _a-z0-9 </dev/urandom | head -c 31`
 PPHASH=`echo "$PASSPHRASE" | sha512sum | tr --delete " -"`
 
 echo "$USER;$STAMP;$PPHASH">>$FILE