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Technology

Securing a Smart Dog Collar: Secure Elements, Key Lifecycles, and Why TLS Isn't Enough on 5 Microamp

Hacker Noon

TechnologyHacker Noon·Sep 15, 2026·1 min read

Securing a Smart Dog Collar: Secure Elements, Key Lifecycles, and Why TLS Isn't Enough on 5 Microamp

The key that was never really yours Years ago I shipped a battery-powered NB-IoT pet collar and wrote about the firmware side of it: FreeRTOS, an STM32L4, safe OTA, and the small humiliations of making a radio live inside a dog's daily…

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