Yes, we need to describe it better. The messages are all symmetrically encrypted using a unique key for each message. The symmetric key is then asymmetrically e

Yes, we need to describe it better. The messages are all symmetrically encrypted using a unique key for each message. The symmetric key is then asymmetrically encrypted using each recipient's public key. We're using strong crypto and we're using it as it is implemented by the platform, so we're not re-inventing the wheel.