diff --git a/.gitignore b/.gitignore
index 914460e..c946bec 100644
--- a/.gitignore
+++ b/.gitignore
@@ -56,3 +56,22 @@ Thumbs.db
 node_modules/
 frontend/dist/
 *.local
+
+# Secrets and credentials (defensive)
+.env
+.env.*
+!.env.example
+!.env.*.example
+*.pem
+*.key
+id_rsa
+id_rsa.*
+*.ppk
+*.p12
+*.pfx
+secrets.json
+secrets.yaml
+secrets.yml
+*_secret
+*_secrets
+credentials.json