I'm writing a document and I am making an important statement in it, which may be used for strategic decision regarding data-management (possibly from never handling sensitive information online to allowing some to be). I am certain of that statement, however I would like encryption specialists to confirm, infirm or precise it. This is the statement:
Important note: as long as the data on the server (name of platform) is encrypted and the decryption key safely stored elsewhere according to protocols established, it does not matter (from an access to the data perspective) if the account on the server is hacked. In that case the real protection for the data is the encryption, not the server itself, although it does act as an additional layer of security.
Context: The data is encrypted on a local device and submitted (encrypted) on to the application on the server. It is then downloaded by users (still encrypted) to be decrypted locally using the key. We are talking about AES 256 bits encryption using CFB. The statement does not concern data management by users (e.g. their handling of the key, as it does state that it assumes this is done properly) and does not concern the mobile devices used to created/encrypt/submit the data (this is addressed separately).
I am aiming at being as precise as possible (e.g. I don't want it to be generic hog-wash more aimed at protecting the writer than helping), but I want to be certain of what is written.
So the question is: Is the statement true in the context defined? If it is not or should be nuanced/modified, what should I change?
EDIT: (The reworded statement according to provided answer below):
Important note: as long as the data on the server (name of platform) is encrypted and the decryption key safely stored elsewhere according to protocols established, it does not matter from a data confidentiality perspective if the account is hacked, although in that case data integrity is not guaranteed. The real protection for confidentiality of the data is the encryption, not the server.