Hi, all: I find Nova has supported volume encryption for LVM volume ([1]). Currently , qcow2 also support encryption now, and there is libvirt's support too ([2]). After reading up the implementation, qcow2's support can be added to current framework. Do you think it is meaningful to introduce the support for qcow2 volume encryption? The use case can be found in [1]. [1] https://wiki.openstack.org/wiki/VolumeEncryption [2] http://libvirt.org/formatstorageencryption.html ---------- zhangleiqiang (Trump) Best Regards