A die is a small, flat piece of silicon inside a computer chip where all the electronic circuits are created and connected. It serves as the core component of integrated circuits, like CPUs or memory chips, and is responsible for processing data. The die is manufactured using photolithography, which etches microscopic transistors and pathways onto the silicon surface. Multiple dies can be produced from a single silicon wafer and then packaged to create the final chip. Understanding the die is important in cybersecurity because its design affects performance, security features, and potential vulnerabilities in hardware.