US Patent 9357381 Security management in M2M area network

The disclosure is related to a machine to machine (M2M) device and a security management method thereof. The M2M device includes an identification circuit. The identification circuit may be configured to encrypt data collected from a sensor with a device identification (ID) of the M2M device and at least one subscriber ID of the identification circuit and to generate a data packet in a predetermined communication standard format by including the encrypted data in a payload of the data packet.