diff --git a/_data/signed/attardi.yaml b/_data/signed/attardi.yaml
new file mode 100644
index 00000000..3ce84db6
--- /dev/null
+++ b/_data/signed/attardi.yaml
@@ -0,0 +1,2 @@
+name: Giuseppe Attardi
+link: https://www.di.unipi.it/~attardi