It's technically possible to make the recorder encrypt the recording in real time using asymmetric cryptography and a symmetric ratchet. Using a private key onl

It's technically possible to make the recorder encrypt the recording in real time using asymmetric cryptography and a symmetric ratchet. Using a private key only the NTSB or some other agency would have, and create a legal framework where they need a court order to decrypt the ephemeral key and release it to investigators. This will eliminate the possibility of your employer or some technician spying on you through this vector as it would require the government to also have a significant interest in a single case.