By user13342178 on Apr 18, 2011
The ODF 1.2 specification allows for stronger encryption algorithms, and Blowfish is declared as the legacy encryption algorithm.
The new version of the standard allows the encryption algorithms listed in §5.2 of xmlenc-core.
Many people wanted to see OpenOffice.org using AES encryption instead of Blowfish - and exactly this is what we have implemented for OpenOffice.org 3.4.
AES-256 encryption will be used for ODF 1.2 documents, but when you configure OOo to use ODF 1.1 or older, then of course Blowfish will be used.
In case you want to use the old encryption and hashing algorithms for ODF 1.2 documents you can configure OOo to do so. As this shouldn't be the case for most people, there is no UI for this, but the configuration files need to be changed directly. See the feature mail for more details.