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How to remove or recover password from a LibreOffice document

rated 0 times [ 6] [ 0] / answers: 1 / hits: 24206 / 3 Years ago, tue, june 22, 2021, 4:01:50

I have 2 old documents in ODT format that I either made a typo or forgot the actual password for them. I want to recover the password or simply remove it. What steps (If available) are there to remove such password (and remind me of not put passwords to documents).

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fieldcheon

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answered 3 Years ago ntlesslving · Accepted Answer

About LibreOffice encryption

I found 2 interesting links. From the links Libreoffice seems to use AES (http://en.wikipedia.org/wiki/AES_(cipher) ) as of LibreOffice 3.5. Before that it was blowfish.

Aveesplace.wordpress

According to LO mail archive (2012 so recent) a brute force with a Windows program called Accent Office will take:



   Max pwd   Accent OFFICE

    Length   Time Estimate (same conditions)

        5    27m03s

        6    1d19h

        7    173d3h

        8    45y197d

Conclusions:

AES has no known flaws.

The only way is to provide the correct password.
and you should always save an unencrypted copy on an external media like an USB disc that is kept safe in your house.