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    Protect TLS in IoT Devices with Secure Companion ICs (.PDF Download)

    May 17, 2017
    Protect TLS in IoT Devices with Secure Companion ICs (.PDF Download)

    The proliferation of connected devices such as industrial sensors/actuators, utility meters, home appliances, wearable/medical devices, metering network gateways, connected toys for kids, etc. increases the exposure of personal, sensitive, or mission-critical data to disclosure and/or tampering. Therefore, it’s essential to protect the data in transit and data at rest.

    In terms of protecting data in transit, the most used protocol is TLS (Transport Layer Security, formerly known as SSL, Secure Socket Layer). Initially created for bidirectional secure communications over the internet, between computers and web sites, it’s now a must-have for securing the communication of IoT devices over the internet. It prevents eavesdropping or tampering of data in transit.

    Because the TLS protocol has been vastly studied, attacked, and fixed, let along being widely adopted, it’s become quite robust. Full use of the TLS protocol relies on some assets, though: It requires storing of private keys that must never be disclosed and/or modified without strict control, and storing of certificates that must also never be modified unrestrainedly in the IoT devices.

    However, since those IoT devices are deployed into the wild, the assets are exposed to attackers who may attempt invasive as well as non-invasive attacks. Invasive attacks consist of opening the enclosure of the device with the intent of manipulating memory content, replacing the firmware, or probing PCB traces. Non-invasive attacks (usually performed through communication ports on the device) target logical bugs in the device’s firmware.

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