data encryption how it works

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http://forum.xda-developers.com – Hi all, i've some questions about the data encryption feature on ICS i'm on mimicry 1.4.0, is it working on this ROM? how it works? and with wich program? if i encrypt my data and do a backup, can i restore this backup? if i want to change ROM, can i restore the backup previously mentioned? thanks sent from # Device: desire z ROM: mimicry 1.4.0 Radio: Launcher: Nova Rom_mngr: CWM Backup: Titanium (HowTos)