Why do I care about cryptography as an IoT architect? What is the deal with cryptography? Why does cryptography matter in the IoT world?Currently, it is estimated that there are about 8.4 billion devices online. Within the next 3 years, the number will be over 20.4 billion devices. As more connected devices are deployed, there becomes a greater need to control and manage the identity of those devices. There is also a need to protect the devices “data at rest” and “data that is transmitted.” Cryptography gives us a way to do that with high assurance and reliability.