16 Nov '17, 4pm

Comment: How chip choice can affect your IoT security

Comment: How chip choice can affect your IoT security

The processor used in an IoT device is influenced by many factors, but when it comes to selecting parts, the primary drivers seem to be price and performance. If you choose the wrong chip you may not be able to correct security issues for products in the field – the only option may be a recall. Because the chip in a common ESP8266 Wi-Fi module has no internal flash, it cannot possibly store your user’s Wi-Fi keys securely. An attacker with access to the device can recover the user’s credentials in under 20 seconds. Its successor – the ESP32 – specifically addresses this issue. But it costs around $3 per device compared to $1.70 for the ESP8266. Most microcontrollers have some form of debug access – JTAG, SWD or proprietary – allowing access to flash, registers and RAM. The majority have ‘fuses’ or other controls to prevent adversaries abusing this access. JTAG read‑protect...

Full article: https://www.electronicsweekly.com/news/comment-chip-choic...

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