Tag Archive: ECDSA

Mar 23 2026

Building a Secure Boot Chain on the STM32F411 (Part 2): Validation, Hidden Triggers, and Reverse Engineering

Author: Shafeeque Olassery Kunnikkal | Category: IoT, IoT Security, STM32F411 | Leave a Comment

Part 2 of this STM32F411 secure boot lab focuses on fail-closed validation, an interrupt-driven hidden UART trigger inside the payload, and preparing the firmware for binary diffing and reverse engineering in Ghidra.

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Mar 23 2026

Building a Compact Cryptographic Secure Boot Chain on STM32F411

Author: Shafeeque Olassery Kunnikkal | Category: IoT, IoT Security, STM32F411 | Leave a Comment

I built a compact cryptographic secure boot chain on the STM32F411 Black Pill using SHA-256 and ECDSA-P256. This lab covers the design, memory map, signing workflow, debugging journey, and the practical fixes that made verified boot work end to end.

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Embedded Security Raspberry Pi UART Grove - Button White Box Penetration Testing Vulnerability Assessment Grove - Relay Adafruit BlackPill Email Fraud Information Security STM32 Computer Forensics Degree Debugging with OpenOCD Penetration Testing Reflected XSS Social Engineering SHA-256 Career GrovePi+ Phishing Embedded STM32F411 "BlackPill" Development Board Binary Diffing Black Box Penetration Testing XSS Firmware Firmware Integrity IoT zero-knowledge testing Hardware Hacking STM32CubeProgrammer Education Interrupts complete-knowledge testing Grove - Temp&Humi Sensor AI Anavi Sensors Grove LED Bar v2.0 LearningJourney Arduino TIGARD HTU21D Grove Starter Kit for IoT based on Raspberry Pi CVE-2018-5798 Ghidra

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