Atecc508a arduino
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The MKR Vidor 4000 also has a Microchip ATECC508A cryptographic co-processer providing hardware-based security, and hardware-based key storage, for connecting your projects to the cloud. The FPGA contains 16K Logic Elements, 504Kbit of embedded RAM and 56 18x18 bit HW multipliers for high-speed DSP;"
The ATECC508A implements a complete, asymmetric (public/private) key cryptographic signature solution based upon elliptic curve cryptography and the ECDSA signature protocol. The ATECC508A has a flexible command set that allows use in many applications.