Re: [notmuch] Idea for storing tags

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+From: "David A. Harding" <dave@dtrt.org>\r
+To: martin f krafft <madduck@madduck.net>\r
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+Subject: Re: [notmuch] Idea for storing tags\r
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+On Tue, Jan 12, 2010 at 11:19:09AM +1300, martin f krafft wrote:\r
+> I think [tag leakage] it makes in-headers unusable. After all, I don't\r
+> ever want anyone else to know that I tag e-mails from my boss as\r
+> "from-idiots", \r
+\r
+You can cryptographically hash tags so that third-parties can't read\r
+the contents of the in-headers. For security, a salt should be appended\r
+to the tag name to make dictionary attacks on the tags more difficult.\r
+For their owners' convenience, mail clients will want a mapping of hash\r
+to tag name.\r
+\r
+> [...] pseudo-mails stored in Maildir and synchronised by IMAP\r
+\r
+A single RFC2822 message can store the salt and hash-to-tag database. It\r
+could contain a clear subject and directions to the end user not to move\r
+or delete it. This would not, I think, terribly confuse existing mail\r
+clients or their users.\r
+\r
+-Dave\r
+-- \r
+David A. Harding           Website:  http://dtrt.org/\r
+1 (609) 997-0765             Email:  dave@dtrt.org\r
+                       Jabber/XMPP:  dharding@jabber.org\r