diff --git a/Protected notes.md b/Protected-notes.md
similarity index 94%
rename from Protected notes.md
rename to Protected-notes.md
index 5914a05..4ed53e8 100644
--- a/Protected notes.md	
+++ b/Protected-notes.md
@@ -44,4 +44,4 @@ Not encrypted:
     * data encryption key is encrypted with [AES-128](https://en.wikipedia.org/wiki/Advanced_Encryption_Standard) with random [IV](https://en.wikipedia.org/wiki/Initialization_vector)
     * data encryption key is random key generated at the time of [[document|Document]] initialization and is constant over the lifetime of the document. If we change password, we re-encrypt only this key.
 5. We use data encryption key to decrypt actual data - note title and content.
-    * encryption used is again AES-128 with [CBC chaining](https://en.wikipedia.org/wiki/Block_cipher_mode_of_operation). IV is primary key (noteId for notes and noteHistoryId for history items)
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+    * encryption used is again AES-128 with [CBC chaining](https://en.wikipedia.org/wiki/Block_cipher_mode_of_operation). Unique IV is generated with every encryption operation and stored together with the cipher text.
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