Quantum computers will be here soon, and it is expected that the first major application that will be developed will be for the cracking of encryption keys. Using Zenfoil PQR means that a second strong ed25519 key has been *pre* shared between both your device and the server, at installation time. Adding a second equally strong key that will NOT be transmitted over the internet during key exchange, negotiation, and rotation, and therefore cannot be intercepted nor surveilled means your data will still look like random noise because it has been encrypted a second time with the (not transmitted) preshared key.