ChApTEr 2 ■ hArdwArE for IoT SoluTIonSperforms the Elliptic Curve Digital Signature Algorithm (ECDSA). Wow! That’s a lot of cool stuff. Figure 2-22
shows the Sparkfun CryptoShield.
You can use this shield to encrypt data before you send it out and unencrypt it upon receipt. This may
sound like overkill, but consider for the moment cases where you have nodes in your solution that must send
data wirelessly or across unsecured network connections. In this case, adding hardware-level encryption
means you can secure your data even if the network is not secure.
■Note Sparkfun also makes a version of this board for the BeagleBone Black.
I’ve used this shield with great success in securing data from one Arduino node to another. I am
planning to use this shield in my IOT solutions to help secure them from surveillance or theft.
Figure 2-22. Sparkfun CryptoShield for Arduino