Tag Archive: Secure Boot

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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Mar 23 2026

STM32F411 Secure Boot Lab Series

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

A two-part STM32F411 secure boot lab series covering implementation, validation, hidden trigger engineering, and reverse engineering preparation on the Black Pill platform.

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Cloudera Enterprise LearningJourney IoT Research IoT STM32CubeProgrammer partial-knowledge testing Grove - Relay JTAGenum GPS Dashboard Black Box Penetration Testing Social Engineering HTU21D Binary Diffing JTAG ECDSA Cloudera Manager CVE-2018-5798 Cyber Security Email Fraud Ghidra UART Hardware Hacking Firmware Dumping Anavi Sensors Education XSS BH1750 Light Sensor Secure Boot BME280 Grove Starter Kit for IoT based on Raspberry Pi Adafruit BlackPill STM32F411 SGP40 Career HardwareHacking Proximity Sensor Debugging with OpenOCD Grove - Light Sensor v1.2 OpenOCD White Box Penetration Testing Firmware Embedded Firmware Integrity Grove LED Bar v2.0 Raspberry Pi

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