I’m looking to use a backup solution together that offers deduplication/incremental updates, while offering clients the option to use end 2 end encryption. Encryption has obvious issues with deduplication and/or incremental updates: a small change will create a completely new unique file.
As such I want to create two backup history profiles. Unencrypted files can be kept much longer than the encrypted data. But this does require being able to recognize a encrypted file. Do the E2EE files use a certain extension or file header?