Abram Early extended the zephyrproject-rtos/mcuboot repository by adding support for the ECDSA256P1Public key type to the image signing tool, focusing on secure firmware validation. Using Python and leveraging expertise in cryptography and embedded systems, Abram updated the imgtool script to recognize and correctly hash ECDSA256P1Public keys, ensuring that only images signed with valid keys are accepted. This enhancement improved the interoperability of mcuboot with public key infrastructure deployments and aligned the tool with compliance requirements. The work demonstrated a focused, in-depth approach to security, addressing a specific need for robust signature verification in embedded device workflows.