ESP32 - Tag - The handbag of Cryptaxhttps://cryptax.github.io/tags/esp32/ESP32 - Tag - The handbag of CryptaxHugo -- gohugo.ioen-uscrypto.maniak@gmail.com (Cryptax)crypto.maniak@gmail.com (Cryptax)Fri, 19 Jun 2026 00:00:00 +0000THCon 2026 Badgehttps://cryptax.github.io/2026-06-thconbadge/Fri, 19 Jun 2026 00:00:00 +0000cryptaxhttps://cryptax.github.io/2026-06-thconbadge/THCon 2026 Badge The badge at THCon 2026 was created by DVID. It actually had 2 firmware: Shipped on the badges for the conference, and reversed by Virtualabs. Interesting blog post, read it! This firmware has the badges communicate with a master using BLE. A specific firmware for a challenge. Getting the XRefs in Ghidra I had dumped the firmware and retrieved the applicative part see Virtualab’s post, but I was annoyed not to have any xref in Ghidra.