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-rw-r--r--doc/encryption.mdwn3
1 files changed, 2 insertions, 1 deletions
diff --git a/doc/encryption.mdwn b/doc/encryption.mdwn
index 29cb8a0bc..bf6a9a229 100644
--- a/doc/encryption.mdwn
+++ b/doc/encryption.mdwn
@@ -89,7 +89,8 @@ that the key has been compromised, it is **insecure** to leave files
encrypted using that old key, and the user should re-encrypt everything.)
(Because filenames are MAC'ed, a cipher still needs to be
-generated (and encrypted to the given key IDs).)
+generated (and encrypted to the given key IDs). It is only used for MHAC
+encryption of filenames.)
## MAC algorithm