TSMR.eu https://tsmr.eu Something with IT security and Rust en-us Binary Rewriting across different Architectures https://tsmr.eu/blog/2026-binary-rewriting/ https://tsmr.eu/blog/2026-binary-rewriting/ Sun, 25 Jan 2026 00:00:00 GMT I wrote a seminar paper on binary rewriting, which allows the modification of compiled binary files without source code, enabling use cases such as fuzzing or hardening proprietary binary files. Introducing my new Generic Network Protocol Fuzzer in Rust https://tsmr.eu/blog/2025-generic-protocol-fuzzer/ https://tsmr.eu/blog/2025-generic-protocol-fuzzer/ Thu, 14 Aug 2025 00:00:00 GMT This blog post introduces my new generic approach to easily create a fast and easy-to use protocol fuzzer for custom targets. twonly - The European Alternative https://tsmr.eu/blog/2025-twonly/ https://tsmr.eu/blog/2025-twonly/ Thu, 01 May 2025 00:00:00 GMT twonly is a European open-source alternative to Snapchat, written in Flutter. It uses the Signal protocol to encrypt all messages end-to-end. Finding Security Vulnerabilities in Open-Source Repos https://tsmr.eu/blog/2025-hackercontest/ https://tsmr.eu/blog/2025-hackercontest/ Tue, 25 Mar 2025 00:00:00 GMT This winter semester I took part in the TU Darmstadt Hacker Contest, where we had an exercise in which we had to find security vulnerabilities in open source repositories. Blackbox-Fuzzing of IoT Devices Using the Router TL-WR902AC as Example https://tsmr.eu/blog/2024-blackbox-fuzzing/ https://tsmr.eu/blog/2024-blackbox-fuzzing/ Wed, 13 Mar 2024 00:00:00 GMT In my term paper about the "Internet of Vulnerable Things" I wanted to find a memory-related vulnerability in a binary running on the TL-WR902AC but was not successful. This time I use fuzzing. AnotherTLS and VulnTLS https://tsmr.eu/blog/2023-anothertls/ https://tsmr.eu/blog/2023-anothertls/ Thu, 21 Dec 2023 00:00:00 GMT To learn Rust and cryptography at the same time I implemented the TLSv1.3 from scratch. The implementation includes all cryptographic operations like elliptic curves or AES.