diff --git a/scripts/authenticator_cost.py b/scripts/authenticator_cost.py
index d4b975d..a1f8826 100644
--- a/scripts/authenticator_cost.py
+++ b/scripts/authenticator_cost.py
@@ -18,3 +18,20 @@ def verify_signatures(committee_size, depth):
     elapsed_time = end_time - start_time
     return elapsed_time
 
+def aggregate_signatures(committee_size, root_members):
+    # Simulate aggregating 3 * committee_size signatures
+    start_time = time.time()
+
+    # Generate multiple EdDSA key pairs for signature aggregation
+    private_keys = [ed25519.create_keypair() for _ in range(root_members * committee_size)]
+
+    # Simulate signature aggregation
+    shared_message = b"Shared message to be signed"
+    signatures = [private_key[0].sign(shared_message) for private_key in private_keys]
+
+    # Aggregation isn't straightforward for EdDSA; we'll skip it in this example
+
+    end_time = time.time()
+    elapsed_time = end_time - start_time
+    return elapsed_time
+