diff --git a/doc/bugs/encryption_key_is_surprising/comment_6_01381524114d885961704acc3f172536._comment b/doc/bugs/encryption_key_is_surprising/comment_6_01381524114d885961704acc3f172536._comment
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+[[!comment format=mdwn
+ username="http://kaizer.se/"
+ nickname="ulrik.sverdrup"
+ subject="comment 6"
+ date="2013-03-06T05:30:16Z"
+ content="""
+I'm not very clear, sorry. S2K is not iterative in the way for example PBKDF2 is. It will hash a very long repetition of salt + passphrase + salt + passphrase etc in one go. The repetition of this happens if more key bits than the hash digest size are needed.
+"""]]