[Libreoffice] Encrypted password -- change?
Dennis E. Hamilton
dennis.hamilton at acm.org
Tue May 31 09:29:25 PDT 2011
I am thinking two (or three) different features are being confused with each other.
In LibreOffice 3.4.0rc2 on Windows, there is no change password option on the Security tab. There is a "Change Password" button on the General tab. It doesn't seem to do anything. It is never not gray. See <http://lists.freedesktop.org/archives/libreoffice/2011-May/012982.html>.
The various dialogs for requesting entry of a password are the same. Be careful not to confuse this button (when it works) and the dialogs for entering a password to lock the read-only state of the document and the separate Save As ... option for encrypting the document. Neither of those have much to do with a feature for changing the encryption password of an already-encrypted document. The Release Note says there is a new feature about document encryption. Not read-only locking.
Changing the encryption password requires re-encrypting the document and it can only be done after de-encrypting the document. Having a button for it is of only of marginal benefit over doing a Save As of the decrypted document with a new password.
Changing the read-only state lock simply requires storing a different hash in the (unsaved) document. (This is called encryption of the password, not encryption of the document. The default hash procedure is not a very strong encryption. The lock is easily removed without having to know the password. The only justification for the hash is to keep the password a secret. Since the hash is exposed to compromise, a valuable password should not be used.)
Is it possible that the two uses of passwords on documents are being confused?
From: Marc Paré
Sent: Monday, May 30, 2011 22:47
To: libreoffice at lists.freedesktop.org
Subject: Re: [Libreoffice] Encrypted password -- change?
Le 2011-05-30 15:24, Cor Nouws a écrit :
[ ... ]
> Safe to include :-)
>>  http://wiki.documentfoundation.org/ReleaseNotes/3.4
[ ... ]
Thanks Cor. Don't know why it didn't work on mine. I'll use your .png for the 3.4 webpage.
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