toerbi's Bloghttps://toerbi.org/Recent content on toerbi's BlogHugoen-usTue, 20 Oct 2026 09:41:00 +0200ECSC 2026 Afterparty - Opening Sethttps://toerbi.org/music/ecsc_2026_afterparty/Tue, 20 Oct 2026 09:41:00 +0200https://toerbi.org/music/ecsc_2026_afterparty/I played the opening DJ set for the afterparty of the European Cybersecurity Challenge 2026 in the Jahrhunderthalle in Bochum. This is a replayed version of the set, based on my track history of that evening. Hope you enjoy :)CUSTÖMER SUPPÖRT - Hack.lu 2025https://toerbi.org/writeups/cust%C3%B6mer_supp%C3%B6rt/Tue, 21 Oct 2025 13:47:00 +0200https://toerbi.org/writeups/cust%C3%B6mer_supp%C3%B6rt/Can you smuggle a string in a PDF that only appears after printing?CÖDEBULLAR - Hack.lu 2025https://toerbi.org/writeups/c%C3%B6debullar/Tue, 21 Oct 2025 11:25:45 +0200https://toerbi.org/writeups/c%C3%B6debullar/A stupid food themed <del>crypto</del> challenge&hellip;BUFFZONE - Hack.lu 2024https://toerbi.org/writeups/buffzone_-_hack.lu_2024/Mon, 21 Oct 2024 17:37:31 +0200https://toerbi.org/writeups/buffzone_-_hack.lu_2024/A simple XSS challenge I made for Hack.lu 2024&hellip;Visual Signature Spoofing in PDFshttps://toerbi.org/publications/visual_signature_spoofing/Mon, 27 Mar 2023 17:44:53 +0200https://toerbi.org/publications/visual_signature_spoofing/I wrote a blogpost about my bachelor thesis topic on my employers blog. Find out how to spoof a signature in a PDF using trusted PDF features.