I was wondering about the effectiveness of the data deletion process when a factory reset is done, more specifically, I was wondering if there is any way to wipe over the data in the user partitions after doing a factory reset. Similar to how someone will fill zeros onto a storage device to erase the contents.
I understand that the encryption keys are destroyed during a factory reset, but i'm wondering if there is any added benefit from deleting the remaining ciphertext from storage and how someone would do that if so