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secure element

A separate small chip that makes and keeps a device's private key and signs with it, so the key never leaves.

A secure element is a tamper-resistant chip that generates and stores private keys and performs signing inside itself, exposing only public keys and signatures to the host microcontroller.

Examples

  • A Microchip ATECC608 wired to the ESP32 creates the device's private key inside itself and signs for the ESP32, so even someone reading the flash never sees the key.

See also

eFuse device identity factory reset
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