+# clone releng repository
+echo "Cloning releng repository..."
+[ -d releng ] && rm -rf releng
+git clone https://gerrit.opnfv.org/gerrit/releng $WORKSPACE/releng/ &> /dev/null
+#this is where we import the siging key
+if [ -f $WORKSPACE/releng/utils/gpg_import_key.sh ]; then
+ source $WORKSPACE/releng/utils/gpg_import_key.sh
+fi
+
+signiso () {
+time gpg2 -vvv --batch --yes --no-tty \
+ --default-key opnfv-helpdesk@rt.linuxfoundation.org \
+ --passphrase besteffort \
+ --detach-sig $BUILD_DIRECTORY/compass.$FILETYPE
+
+gsutil cp $BUILD_DIRECTORY/compass.$FILETYPE.sig gs://$GS_URL/opnfv-$OPNFV_ARTIFACT_VERSION.$FILETYPE.sig
+echo "ISO signature Upload Complete!"
+}
+
+signiso
+