This presentation discusses how data compression using GZIP can significantly reduce energy consumption in Internet of Things (IoT) devices. It describes how compression of firmware, local data storage, and wireless transmission data can lower the power used by non-volatile memories, radio frequency transceivers, and microcontrollers. The document provides examples showing compression can reduce energy usage in IoT nodes by 40-50% depending on compression ratios and system duty cycles. It promotes using GZIP/GUNZIP intellectual property cores from CAST which are well-suited for IoT devices due to their low latency, silicon footprint, power demands, and easy integration.