This is a suggestion to implement a way to allow one party to write new files to a maidsafe account, without being able to view or edit the contents of the account, to advance personal security.
This would allow a setup where new information such as recently taken photos, videos/audio being recorded, or phonecalls could be securely backed up automatically from a phone signed in with this write-only password. The information would be protected from everyone, potentially even the owner of the account if they choose not to memorise their own password (which would protect the information from coersion). No-one could be sure that information has been written to the account as the network wouldn’t disclose when the account becomes full, and there would be no option to view the recently uploaded files, providing plausible deniability.
Here’s an extreme hypothetical case in which this might be useful: Someone is filming a crime being committed. The criminal takes their phone, deletes the file, and smashes the phone. Part of the video is then stored on the network, invisible to all but the owner, who can then present it as proof of the crime. If this became well-known, anyone being filmed would know that they can’t necessarily silence the witnesses.