diff --git a/pyoaev/signatures/types.py b/pyoaev/signatures/types.py
index e8381f8..e10759d 100644
--- a/pyoaev/signatures/types.py
+++ b/pyoaev/signatures/types.py
@@ -59,6 +59,11 @@ class SignatureTypes(str, Enum):
     SIG_TYPE_CLOUD_REGION = "cloud_region"
     SIG_TYPE_TARGET_SERVICE = "target_service"
     SIG_TYPE_QUERY = "query"
+    SIG_TYPE_URL_HASH = "url_hash"
+    SIG_TYPE_FILE_HASH = "file_hash"
+    SIG_TYPE_SOURCE_EMAIL = "source_email"
+    SIG_TYPE_TARGET_EMAIL = "target_email"
+    SIG_TYPE_EMAIL_CUSTOM_HEADER = "email_custom_header"
     # AI adversarial validation: correlate AI defense (LLM firewall / guardrail) events back to a
     # specific AI inject execution.
     SIG_TYPE_AI_REQUEST_MARKER = "ai_request_marker"