Just make doubly sure you backup the Certs and all Master Keys in a very safe place(s) that you used to originally encrypt the data and restore those certs across your DEV,QA, and prod environments so your backups will restore and move across those environments with ease and without issue. Otherwise, you are up the creek without a paddle. Safe storage of all your Certs and Master keys are the "key" to encryption. Your job will depend on it, trust me. Also, test,test,test. :-D
"Technology is a weird thing. It brings you great gifts with one hand, and it stabs you in the back with the other. ...:-D"