1 files changed, 5 insertions, 0 deletions
diff --git a/README.md b/README.md
index 7165469..d556818 100644
--- a/README.md
+++ b/README.md
@@ -116,6 +116,11 @@ supported modes see:
 You can configure a passphrase for the encryption keys in `borg_passphrase`of
 your Borg backups, but it is not used by default.
 
+> [!WARNING]
+> **Enable a passphrase for true end-to-end encryption.**
+> If you want true end-to-end encryption, you should configure a passphrase
+> Read more: [BorgBackup Security](https://borgbackup.readthedocs.io/en/stable/internals/security.html#offline-key-security)
+
 `borg_included_dirs` and `borg_excluded_dirs` finally picks what directories
 will be backed up by Borg.