1 files changed, 7 insertions, 0 deletions

diff --git a/doc/threat_model.md b/doc/threat_model.md
index 26e3741..80b57f3 100644
--- a/doc/threat_model.md
+++ b/doc/threat_model.md
@@ -17,6 +17,7 @@ Mat only removes standard metadata from your files, it does _not_:
   - handle steganography nor homoglyphs
   - handle stylometry
   - handle any non-standard metadata field/system
+  - handle file-system related metadata
 
 If you really want to be anonymous format that does not contain any
 metadata, or better : use plain-text ASCII without trailing spaces.
@@ -91,3 +92,9 @@ Requirements
 
                 - MAT2 *must not* fail silently. Upon failure,
                 MAT2 *must not* modify the file in any way.
+
+                - MAT2 *might* leak the fact that MAT2 was used on the file,
+                since it might be uncommon for some file formats to come
+                without any kind of metadata, an adversary might suspect that
+                the user used MAT2 on certain files.
+