US Patent 10305862 Secure communication with a mobile device

Method and system for securely communicating with a machine to machine, M2M, device comprising sharing a secret or data derived from the secret between the M2M device and a server. Establishing a connection between the M2M device and the server. Using the shared secret or data derived from the shared secret to establish cryptographic material on both the M2M device and the server. Securing communication between the M2M device and the server with a cryptographic protocol using the established cryptographic material. The cryptographic material is unrecoverable from the shared secret or data derived from the shared secret alone.