Refreshes and copies with Volume encryption enabled.

Hi everyone -

Was wondering if there was a good paper/SAP note or admin guide available with regard to volume encryption being enabled.  We have been asked to encrypt our data at rest, which is simple enough - but we need to test copies, refreshes, and restores.   Thus far I've not been able to find much on the subject.

My initial suspicion is that the data moved through the backup process is decrypted as it's passed through the in memeory processing for the backup - so it can be used with no further steps, but would like to read it somewhere before I start testing.

Thanks!