Worked on the mcuboot repository to address a critical issue in bootloader size calculation, specifically when handling data chunks containing both headers and TLVs. Focused on embedded systems and firmware development using C, the work involved correcting the encryption and decryption size logic to accurately account for all data components. This fix prevented potential data corruption during region copy operations, thereby improving the reliability of firmware updates and secure boot processes. The solution was validated through targeted code review and testing, ensuring robust handling of bootutil region copies and enhancing the overall integrity of the bootloader’s update mechanism.