MANIPULATING INTER-CHIP COMMUNICATIONS FOR IoT SECURITY

A method, comprising:

• performing, by a computer device:
• capturing inter-chip communication data among a plurality of microcontroller units (MCUs) on an Internet-of-Things (IoT) device;
• determining, based on the inter-chip communication data, a message structure of messages associated with one of the MCUs;
• generating, based on the message structure, modified messages for the MCU to obtain response messages from the MCU, wherein individual ones of the modified messages alter different bytes of a field in the message structure;
• and
• determining, based on the response messages, an encoding of the field in the message structure.

A system, comprising:

• a security server implemented by one or more computer devices, configured to:
• receive inter-chip communication data among a plurality of microcontroller units (MCUs) on an Internet-of-Things (IoT) device;
• determine, based on the inter-chip communication data, a message structure of messages associated with one of the MCUs;
• generate, based on the message structure, modified messages for the MCU to obtain response messages from the MCU, wherein individual ones of the modified messages alter different bytes of a field in the message structure;
• and
• determine, based on the response messages, an encoding of the field in the message structure.