Through an IPsec VPN, IoT devices can securely send data over a cellular network. IPSec uses a VPN tunnel as a secure, two-way network connection between IoT devices and network infrastructure. It is highly scalable and can support a large number of devices.
IPSec protects data at the IP-Layer and uses keys for the authorisation of data packets. The encryption is handled by the VPN, as opposed to the device itself, reducing power and data consumption.